I came to this conclusion too after at least 20 years of using tabs; but mostly it was because of moving to white-space significant languages like Haskell, F#, etc. It was just too painful getting everything lined up with tabs and I needed the fidelity of spaces.

Previous to that with C/C++/C# the alignment usually took care of itself through the closing brace and IDE auto-formatting. So tabs was the natural unit of currency there.

Horses for courses I guess.