It all began when I had to deploy a change, that needs to go live today.
The software to build the docker image failed because of the ruby version not being supported... and so began the "let's update this outdated rails app with obscure dependencies"-dance that took an hour or so. (Updating a rails app from ruby 2.x to ruby 3.x where many dependencies are locked to 2.x)
And then I ended up at the "this ruby version is not supported".. because the one I have installed locally on my machine has be succeeded by a newer version - and the build...
Trying to install this version with rbenv also failed, because the install of ruby build is out of date, and we need to run a brew update...
Finally did that (while writing this) and now I can run the rbenv install command....
Hopefully this is the final step, or I will start having a tantrum.