I don't think you can choose 30 days. It is 5 years or no service. At least that's what it looks like to me, I did not find a way to accept the new policies without accepting 5 years.
Notice that other shells also has associative arrays, or at least zsh. I've found hyperpolyglot [0] to be a nice Rosetta stone for translating syntax between e.g. bash and zsh.
* A password manager (PasswordStore [0]), in which I may make entries without passwords but where I indicate my ID on a given account.
* A personal wiki in which I may indicate for something that I have an account connected to e.g. Google or whatever.
When I come to some service that I vaguely remember having used before, I will find the necessary info either in my personal notes or in my password manager.
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.
I don't think this is a big problem with VimTeX; I've worked quite a lot on these things, and my personal experience is that VimTeX is now quite fast both with syntax highlighting and with folding; although for folding, you do want to use the various "hacks" like the manual fold option or a plugin like FastFold.
