Interesting! Is the post available somewhere?
I've been using a combination of barefoot and more traditional running shoes for 4ish years now. I usually run some of my easy runs on barefoot shoes (once or twice a week), but longer and speedier sessions on Altras ( zero drop and good toe space still! ).
While bringing the barefoot shoes into my running mix I had occasionally some feelings on my ancles, but allways when such happened I reverted back to more cushioned shoes for some days. A definite pro with barefoot shoes is that it really helped with my running dynamics (naturally higher candence) and I feel it has made my calfs stronger, as they were commonly a bit sore after a run, when i started. As others already have suggested: start gradually
Yes Nextcloud Maps does provide geovavorites and I've been using it for years. And there's also an Android client which is quite basic but does the job 👍
https://f-droid.org/packages/it.danieleverducci.nextcloudmaps