The naming is dreadful. What comes after the Xperia 1? Why the Xperia 1 II of course! I swear only their console division is capable of clear and sensible naming.
Their phone division is run by their camera division and unfortunately the naming makes sense in that situation
They've fallen seriously behind in software support. This will be mitigated by EU legislation forcing longer support, but it'll still be behind Samsung/Google.
I think only Samsung and Google are doing 7 years of updates. Plus fun fact Sony releases Asop builds of newer versions of android 3 years after eol. But for some reason they won't extend updates for their gms roms https://lemdro.id/pictrs/image/fb737914-22cf-4dfc-b367-9fa2258ac4ab.png