I had a lot of crashes too so I stopped using it.
I think the crashes were related to the fact that RB is 32 bit and the file sizes were getting to be aver 500Mb.
Must have been hitting some type of RAM limit on my old hard ware.
Another this was that wanted to try out some plugins and see what was so great about a plugin that I had read about.
I had to jump thru all kinds of hoops to try to get them to work with little success.

So then I heard about Cakewalk by Bandlab.
I moved my project to it. Spent some time to learn a bit.
No crashes and no issues at all to try out a plugin.

Later I heard about Reaper.
Found the tutorials at Reaper.fm to be very very very easy to follow, interesting and informative.
After the 60 day trial I bought it for $60.
No crashes. 64 bit. all plugins run with no effort. great support. awesome training.

Reaper does not load all of the files into one file.
The reaper file is very small.
If you browse to the folder you will see lots of files. every audio take etc stays external.
you can undo to your hearts content.
Save is very fast because only the new areas get saved. not 500mb every time you hit save.

Your mileage may vary, but that is my story