I've spent the last six months trying out new fonts (m0n0, hack, monoid, hasklig, fira code, mononoki, fixedsys excelsior, iosevka, source code pro, input...)

Nothing cuts it, there's always that tiny thing that bothers me, and I'm back with Ubuntu Mono.

Yeah it's great isn't it? I've tried heaps of times over the last few years to switch and haven't found a font I like better than Ubuntu Mono.

OT question: a lot of fonts come in all possible formats. If I am just installing them on my macOS box, does it matter which format I install? Is there a reason to prefer say .woff2 over .ttf? Or are they functionally equivalent?

woff and woff2 are web font standards. I don't think they're supported by most operating systems.

Well fair enough, but what about TTF vs OTF?

OpenType (otf) is more modern than TrueType (ttf) and supports more functionality and features within the font.

So if installing a font locally, OTF is the way to go if it's available?

Yep!

How long did you try it? I found I had the identical reaction to you -- that it was way too narrow, being used to much wider monospace fonts. It took me about a day to get used to it, and now I love it to death.

It's probably not the font for everyone, but I mention this because I had the same initial reaction as you, and I'm super glad I gave it a serious try.

Iosevka has many weights and is customizable though. Or you mean narrow?