I switched to the extraordinary MiniBlog Core made by Mads Kristensen. It is an utter lightweight and fast blog, made in ASP.NET Core. I like it very much and will try to customize the looks as soon as I have grasped how to do that.
The migration wasn't very difficult because Mads made a utility that converts BlogEngine posts to MiniBlog posts. Genious!
Some posts might not be chronological but I don't think that's a big deal.