If the outward appearance of the Xperia 10 and 10 II don’t suit your fancy, you could explore an older supported model like the XA2. I find it to be a rather elegant design, the squared off design blends to a natural metal curve, and the screen-to-body ratio is excellent, even with a chin and forehead. I honestly think it goes well with the SFOS design of the bold colors for the pulley menu, far better than the edge-to-edge approach of the X10s. And it’s still an excellent performance bump from the J1. No, it does not support aarch64 with Kvarken, but with the necessity of rewriting applications to work with aarch64, that won’t be a major loss for quite some time.
The XA2 also has a very good size overall, certainly bigger than the J1 but not as massive as the X10s, though if you wanted, the XA2 has a Plus and Ultra model that hits that 6" phablet size. If you’re used to that iPhone 4S at all, the XA2 is the only alternative besides the old XX that you can’t even buy the SFOS license for anymore.
Most XA2s only have 32GB of space though, 64GB models are only available in the Plus and Ultra. Battery life has always been solid for me, I’m on my second year, third in November, and I still regularly finish the day with 40%, and am very careful to use only 5V1A or 5V2A chargers.
Even if third-party / Android app support isn’t a big deal for you, having support for Android 10 as opposed to 4.4 will still be tremendous for performance and capabilities. I don’t find webapps to be comparable in performance for anyone who might need those services, but I know having access to a working webapp at all is better than the nothing I get with the Sailfish browser. I’ll sacrifice and have a little bit of Google Chrome with Bromite to ensure better access to some websites.
I’m a bit confused about you mentioning “swiping instead of typing” and you do go on to describe swiping, but more in the sense of the UX design Sailfish has of gesture interfaces. If you do mean this, “tapping” is the proper term. If you’re trying to describe the swiping method for the keyboard, Sailfish doesn’t have that officially, which both Android and iOS do have that, included with the OS from the moment you turn it on. For SFOS you need to download “OKBoard” which is on a third-party repository. This is still an impressive inclusion and a good option to have, though it doesn’t do it as well as its counterparts (it breaks if you try to swipe the word “is”).
To cover the last bases of that, admittedly SFOS hasn’t done amazingly well with voice assisted technology, and once again the community has come in a few times to try and implement that. Snipek was one such attempt that used a self-hostable voice module, but now Snips has closed source. At this time there’s only one app even trying, Speech Note, using Mozilla DeepMind. However, I believe Pure Maps does allow a TTS engine to dictate travel. It’s more rudimentary compared to modern GPS apps, but if Android support is in the cards, Magic Earth is free, no ads, uses OSS (though isn’t OSS in and of itself).
Fingerprint reader is on the XA2, and is good. Tapping it once lights up the screen but sadly opens at the PIN code and not the clock, a second tap automatically unlocks it. It’s fairly responsive though. Amazingly it’s about the same size as the camera, but it’s positioned just right so you’re never smudging the camera. It isn’t an incredible camera, but it’s reliable for the occasional document scan or schedule snap.
It’s possible I’m overlooking a lot of things but I am admittedly handling a lot of Sailfish’s shortcomings with Android. But my use case is just different, and maybe I’m a bit of a masochist for just dealing with it.
I personally got bored with Android, I dived over to Blackberry 10 a long time ago and it was a blast for all of 2 years. Eventually I had to come back to Android and it wasn’t until I got the opportunity about where I live to purchase and use a Sony phone as a reliable daily driver. Sailfish OS was in beta for XA2 right as I got the phone. So even as an Android user and certainly using a lot more services than some people, I’ve been able to use SFOS instead of Android for a lot of things. I think a staunch, long-term user like yourself simply needs to upgrade your hardware, and expand your horizons.