I agree in general, but the 'vim in combination with a few small plugins may lead to your whole computer locking up' is extremely misleading.
It's the editor which has frozen, not the whole computer. And the plugin in question is a fairly complex autocompletion / analysis plugin for python. There's a bug listed in that thread, to do with it scanning all the files millions of times, but the big problem actually isn't bloat, in this instance, it's the non-async nature of vim. neovim should, I hope, solve the 'totally unresponsive' problem, and hopefully someone fixes the rope/vim interaction re-scanning all the files bug.
But it's not bloat, per se.
If your whole computer is locking up due to this, then that's a scheduling issue, and you could try switching scheduler, or lowering the 'nice' priority of that program.
Not that we should have to care about such things - that's pretty terrible.