That would be fantastic!
Not sure how difficult it is or would be to include similar functionality as the Chrome "Session Buddy" extension has, but that one is nearly perfect. Just food for thought

PS: Since there is literally nothing else available on the market for Safari, I'm sure there is demand and willingness to accept a price tag.

It is indeed. However, I promise it wasn't there 2h ago...super weird.
But happy it's not gone...and for that I'll happily take the blame

Hey guys,

You've had the only session extension for Safari on the planet.
Why silently kill it?

Or, and this is what I'm secretly am hoping for, are you releasing a new version?

All the best-
P.