@craw_advantage when I hear people talk about accessibility I often mentally picture someone who already has a legacy deck as the person trying to get into vintage; someone with duals/fetches/forces/jaces can play vintage with 10-15 proxies, or someone playing ancient tomb/chalice decks in legacy getting into shops, or throwing solomoxcrypt into their modern eldrazi deck(rip).
I think this is a pretty common way that people look at this, but I also wonder if it's a little outdated. I don't think people necessarily work their way backwards through formats the way they might have once, and Legacy itself is also prohibitively expensive at this point, which is definitely shrinking the player base by keeping people out and which will probably lead to versions of this thread popping up on The Source a few years from now if nothing changes about the reserve list.
Ultimately, the question is just what people want the future of the paper format to look like. If you want it to grow, I don't see any way to encourage that that doesn't include being very liberal with proxies. That's not a priority for everybody though, and if what people want is an format that is mostly online-only but has a handful of high-profile paper events a year, that could be ok too.