I used to use DI/1 and really liked the simple nature of using the framework but, I am having some reservations about re-adopting it as I am worried about having it not work as CF/Lucee update . Wirebox seems solid but just prefer DI/1 simpler configuration.

What updates broke it?

There are likely enough users on fw/1 that if a cf or lucee update breaks it, it would be patched prior to those going live. I don't have any real need to change the way it works, it already does what I need/want.

Ah, so @spills concern is academic, about possible future changes/breakage, b/c DI/1 isn't as actively maintained as it used to be? Yeah, what @Matt Jones said: if either engine broke DI/1 during alpha/beta testing, the engine would almost certainly get fixed. That said, there's def. an argument in favor of simply picking the best-supported DI framework... but there's also an argument in favor of picking better-supported technology than CFML for new projects anyway... so... 🤷🏻

Old legacy project and it's not going anywhere for a few years. I am just trying to adopt some reasonable conventions to help wrangle code which will hopefully help us to figure out what the heck to re-write later ;)