I am not that concerned with theft deterrence. I am looking for fasteners long-term performance and standardization.

Torx appears to be a superior alternative as long as one uses high quality bits (I use Wera). However, hex is the dominant standard and it is not clear that I could replace brakes' and shifters' hex with proper Torx, although I haven't really looked into it, yet. Still, it now looks like I'll change cage/rack/fender fasteners with Torx after all. And consider replacing component screws as well, if not components altogether (ZIPP stems and seatposts come with Torx)

One thing I think I have learned -- stainless steel fasteners and (cheap) alloy components (my stem to be specific) must be handled with extreme care. It took maybe 4-5 handlebars removal (travel related) to damage the stem clamp threads. Looks like you have to thread as if you were trying to break a safe...