Sublime future development seems pretty much dead, or at least as pace that makes it impossible to rely on future updates. I imagine the main developer got sick of working on one programme for nearly 10 years and wanted to do something else and who knows what internal politics is going on internally that stops someone else taking over.
Having said that Sublime Text is still a great text editor, which a great plug-in community. You don’t need constant future updates if the software already does what you need it to do. Look at the Unix tools, when was the last time you panicked because grep hadn’t been updated since 1992.
If Sublime Text doesn’t have a feature you need, and you can’t find a plugin for it, and you can’t write it yourself in Python, then don’t use Sublime Text as it will probably never get added.
But if Sublime Text already does what you need it to do (which is most things when you factor in plugins) then why the heck not use it. You can trial the program for free and its only 70 bucks. I would happily pay that to get an dedicated text either rather than a repurposed web browser pretending to be a text editor. Panicking that there is no more updates coming is silly unless you really need something added or fixed. People worry too much about investing in a single program. If 5 years from now Atom or Brackets are actually fast and usable moving over to them is not the worst thing in the world, and you would have had a very fast powerful text editor up until then.
It is much better to use a fast powerful text editor that works now but that might never get updated again than to use a slow weak text editor that is getting updated constantly but still has a long way to go before it is good.