I made it!
Upgraded from nodebb v1.17 on Ubuntu 18.04 with mongodb 4.0 to nodebb v3.2.1 on Ubuntu 20.04 with mongodb 5.0. Used node v18 to update nodebb.
Had a few minor issues (getting rid of an expired mongodb 4.0 key), thinking of using npm install --global npm@6 to avoid any issue with plugins updates (emoiji, markdown).
Thanks for all the work, the new admin dashboard is sexy as hell.
Keep up the good work and enjoy your summer!