I just upgraded the laptop from my gf from ubuntu 19.10 to Linux Mint 20 using the repositories and apt-get without any big issue.
I did not expect this to work as smoothly as it did. The only important thing is to install 'mint-meta-cinnamon' or 'mint-meta-mate' as the first action after replacing the apt sources.
So yea ... if you don't like snap and want to have an actually smoothly running ubuntu-derivate, go for it.
But I don't like snap :(