I started using manual folds with latex. Works fine esp if you have a hotkey/snip for inserting these. % {{{ and % }}} for begin/end for instance. Much faster!
Just be aware that the marker based folding can be annoying to collaborators if you are working on documents with other authors. With a plugin like FastFold [0] you should be able to have fast folding with the expr foldtype.
[0]: https://github.com/Konfekt/FastFold