I am running a 1.12.2 server with many plugins and multiple worlds. It looks like upgrading is necessary as many plugins no longer support older versions due to the changes under the hood in minecraft. Also the upgrade might help bring players to my server. My server lost most of its players but a few dedicated players remain and it would be nice to keep my main world and the builds these players have done. I have read that it is possible to convert a 1.12.2 world to 1.13.2. I have also heard that it leads to a lot of problems. So my first question is is it advisable to convert or would I be better off just generating all new worlds? After I decide which way to go I need to figure out the logistics of how to go about doing it. Will I be able to keep plugin data like stuff in backpacks, town data for towns, chest protections etc? I appreciate any advice as to what to do and how to go about doing it. It seems like it is going to be a major job and I am not the most experiences or knowledgeable server admin.