You are one of the best candidates to use LTS releases.
I believe the build service will update independently, but in parallel with the main releases. Hence, updates will also benefit the LTS releases.
I see some of my plugins there, though. On my part, I have already updated all plugins to SDK v2. I'm just finishing up testing with the alpha testers, and it should be good to go soon. I had to hold out after finding out the migration wasn't always a direct port.
For the rest of your plugins, I guess that's what the LTS releases are for. I have plugins that the authors have already abandoned, and I'm thinking about porting them myself.