I don´t know, what you are doing there...
FLS is more performant than ever before since the last updates, which have improved Mixer routing and Patcher and ...crashes...???? Never had some the last years even with betas...
If I encounter something where I open a post in the support forum it´s about something not working right like atm changing Maximus attack knob on any band is not reflected in realtime in the hint panel or there was a little flaw with naming...so absolutely minor stuff...
To state FLS would be highly unstable is simply not true... more likely is that you use specific plugins or something else is going on on your machine, which FLS doesn´t like...
Performancewise I did a whole lot of tests and FLS is perhaps the less performant one compared with Reaper/S1/Ableton/Bitwig but with a very very small difference...
We are talking about being able to load 1 or 2 instances more of a total of a hundred...
Meaning in FLS you have perhaps to freeze something 1 minute earlier than in another DAW... if this matters to you... well...