I don't know. But if I don't do it and it turns out it was necessary after all, I'm too late by the time I find out. This just gives me more peace of mind, and I don't really see a reason why not to do this: it's only one tickbox during installation, nothing else changes and I need to type a password to login anyway. I don't think my spare laptop gets slower from an additional layer of encryption, as it has multiple CPU cores and I barely use one of them. So it's really a no-brainer to also encrypt the home directory.
Is it Linux? If so, then yeah the encryption is faster. Internally Windows uses the same algorithms for encrypting the OS (using Bitlocker), but traversing the FS is slower on Windows and hence, the lag occurs mostly on Windows machines. But Windows are generally heavier than Unix based systems.
Ask yourself this: if someone gets their hands on your spare laptop during a trip, would you want 1 or 2 layers of encryption?
Ideally 10, but I suppose that it will be too late anyways if this happens. Not too late for my data, but too late for our happy voyage.
A keyboard

I don't like typing on my phone, and I do trust my laptop a lot more than my phone. I don't use much more than just a browser though, or maybe watch a movie.
Yeah I am an extremely slow typer on a phone. And the truth is, I am not the classic old guy who doesn't get along with technology. (No age shaming of course, being old is not bad, or at least that's what I like saying to help me feel better)