Well to be clear, the only motivation to modernize is that the forum is starting to fall apart (Skinny's been cobbling stuff together in the back end, and it's barely holding together with duct tape). Not just falling apart as in loading slower or ceasing to function, but also that there are unpatched exploits and we're increasingly being hacked - it just happened again a couple of weeks ago.
So if our motivation is just to keep stuff running, I think it should be akin to picking up a new Camry to replace our 25 year old Camry, rather than updating to an ES500h.
For example, I'm on rivianforums.com. It doesn't look that different to RS:
https://www.rivianforums.com/forum/f...an-r2-forum.8/