Yeah .... like most of you, I have many years on square-taper cranks ..... the only issue is that, as [MENTION=411117]PDKL45[/MENTION] says, if they get a little loose they left one gets rounded out quick. Otherwise, square-taper is rock solid----rock-heavy too, but no bike is light when you're walking along pushing it ...

You can remove Hollowtech with a rag and a wide-jawed set of channel-locks if you are very careful. I eventually spent the $7 or whatever for a tool.

Square taper you pretty much need to buy a crank-puller, which is more like $15-20 .... but so what? The tools last forever

Other niggling issues---Hollowtech requires a wider Q-factor and might change the chain line, but it also supports the spindle better (bigger, wider-spaced bearings. Probably also doesn't last as long, but is cheap and easy to replace, but no cheaper or much easier than a square-taper.

The big thing for me is that Hollowtech is lighter and supposedly stronger---because my massive power, which occasionally approaches triple digits, just destroys components ..... right?

I'd still get the Sora but if I had both bikes and alternated days on them I'd bet I would love them both equally.