One thing with RB, let it settle down before attempting things.

Give it an extra 10-15 seconds or so.

It seems to play nicer for me when I do that, so it's my workflow.
RB looks like it is ready to run before it is.
I agree Reaper is more efficient and faster to load, but Reaper can't generate RTs or RDs ..

If it helps, I think you can select multiple tracks and delete them all at once in just a few seconds.

Hold CTRL and click all the tracks you want to delete.


Make your sound your own!
.. I do not work here, but the benefits are still awesome