certbot is in the repository of most Linux distros... At least on Debian you can simply apt install certbot so it's actually easier to install than acme.sh is :)
apt install certbot
Both are good options though!
That's true. But acme.sh is just one script to download, you don't really have to install it. I keep it in ~/.local/bin or /usr/local/bin on my systems. You need to supply hook scripts though, but that is required for Certbot too.
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