Magix is a large German software development company.
They do far more than create/sell DAW software... (Graphics, Web-Design, Video Editing, etc)
Just bought Vegas from Sony... so I doubt they're in financial trouble.
Gibson is half a *billion* in debt! Boggles the mind as to how that was allowed to happen...
IMO, Samplitude's Object based audio editing is still significantly more advanced than most other DAW applications.
The one exception being Reaper (with its Item based editing - which was "cherry-picked" from Samplitude).

The MIDI side of Samp isn't as advanced as Cubase, but the Piano Roll is nice... and the notation is decent.
I prefer Sonar's GUI, but I can get around Samplitude pretty easily (wrote the English users manual for a earlier version of Samplitude 2496).
One thing I miss in Samplitude (vs Sonar Platinum) is Track Templates.
Simple feature... but what a time-saver
Performance wise, I don't think Samplitude is particularly inefficient.
They implemented a Read-Ahead Performance Cache a *long* time ago... and that dramatically increased performance. Reaper is the most CPU efficient DAW application. Sonar Platinum is one of the more efficient DAWs.
By comparison, I find Samplitude's performance to be middle-of-the-road.
Much more efficient than Live (albeit Live's audio engine is focused on other priorities like Warping audio)
If you're a long time Sonar user, no matter which DAW you choose to be your new #1, you're going to make some compromises. There will be some things you love (gap-less audio engine)... and others that'll leave you scratching your head (no Track Templates).
All the current major DAW applications are capable of amazing results.
It's just a matter of finding the one whose "compromises" best suit your situation.