This should be reviewed, with consideration to CI which will likely need some alterations.
Some plugins will break mainly due to OTAPI3 hook changes (those authors can see the migration list here), however those solely dependent on TSAPI/TShock should see essentially the same API, except needing to upgrade to net6 (help from the upgrade assistant but often more manual work is required).
This should be reviewed, with consideration to CI which will likely need some alterations.
Some plugins will break mainly due to OTAPI3 hook changes (those authors can see the migration list here), however those solely dependent on TSAPI/TShock should see essentially the same API, except needing to upgrade to net6 (help from the upgrade assistant but often more manual work is required).