A couple of years ago there was also a lower adoption of html5 elements. Having one h1 tag per page is still a good Idea in general, but it is allowable to have one h1 tag per containing article tag as well. Since this theme does not seem to use tags like article and aside (that I've seen in my quick check) I agree that there should only be one h1 tag per page which contains the page title or headline. The theme structure is otherwise good, but could definitely use with some contextual revamping of quite a few divs.

Redis backs up to storage at set intervals (configurable). For example you could have it backup every 15 minutes or every 200 times its accessed (think that's how the calls work). So if your sever did mysteriously crash. The most you'd lose would be whatever happened since the last save. You can use MongoDB instead which saves everything to storage. But isn't as quick in terms of read/write. Hope that helps.

@felipeolcav https://community.nodebb.org/topic/5882/nodebb-plugin-bbcodes-bbcodes-plugin-v2-0

Never had any kind of performance issues. Always quick loading with no delays. I can't say that for all of my vb run forums.