I would like to make one simple assertion:
If you are running an older version of YaBB SE, or have not upgraded to SMF as of when the public beta is released... chances are you have not been to the site. If you haven't been the site, you wouldn't miss any of the boards that are gone or even all of them if they were to evaporate.
For most people, a viable and easy solution to support issues is... simply... to upgrade. As far as the mods issue, well, frankly... if you are experienced enough to make such modifications, you may not really miss the support here.
If you do, well, you'll have to weigh things. Maybe you have a '52 automobile that you've made ten times faster than it was originally, but a modern car will always out-race it. At some point, you're going to have to decide to upgrade or be left in the dust.
Now, don't misunderstand this. If anyone ever has a problem with a YaBB SE forum, even five years from now, I and others are willing to help. But at some point, outdated software has to be dropped.... Microsoft doesn't still support Windows For Workgroups 3.11, do they?
As to people who can't upgrade due to requirements... at some point they will also have to weigh how worth their money the host is. Even
lycos.co.uk runs SMF perfectly and wonderfully fine - even the package manager and attachments - so if you're being hosted and PAYING for it, and they won't upgrade.... obviously it's time to change hosts.
-[Unknown]