Simone Carlo Surace

Ok, these are the highest lower bounds that work.

So now that we found good lower bounds, I will condition this O(number of compat entries) CI on a tag, and only use the downgrade action (which downgrades all packages...

I think I went about it the wrong way. I bumped the lower bounds before the pipeline was doing the correct thing. I should maybe start from scratch.

Ok I think now we have it. Switching to the low-cost action now.

I think the action that pins all dependencies at their minima is too restrictive. I will disable both by default and let them be enabled by the `downgrade-ci` PR flag....

The action fixes each dependency separately to its lowest version that still resolves, and runs tests there. In response, I bumped the lower bound to the lowest possible version where...

In contrast, the test-simple job would pin all dependencies to their lower bounds simultaneously and then runs tests there. I figured that this is too strict a requirement.

Sorry, I deleted the branch by accident.

Further details, as shared on Slack already: The `DataFrame` was 84x13075, a single `Date` column and 13074 `Float64` columns.

The table isn't transposed because in general the columns are more heterogeneous. But this should be well below any hard limits, I've even written tables with 100000 columns before without...