Blindly bought the 10 III after reading the blog post about it:
the amazing effort Jolla’s adaptation team has put into making the Xperia 10 III run as efficiently as possible
Source: Meet the Xperia 10 III with Sailfish OS | Jolla Blog
That, in combination with the huge battery and my experience with Sailfish OS so far, was very promising, more than one week of unattended runtime could be achieved. The 10 III is my most expensive phone. Mr. Mäkeläinen, I am disappoint.