Kodi / LibreELEC has add-ons available to most of the most popular streaming services. The trouble is that it hasn’t the necessary licenses for playing content in the best resolutions (the same goes with most browsers). I myself have a Homatics R 4k Plus (which is a licensed box) and installed CoreELEC. When using Android I can stream my content in the highest resolutions (Star Plus, HBO Max and Disney Plus) but when using CoreELEC I can’t.
I second that. I’ve been using it for a couple of years, syncing calendars and address book with both my PC and my Android smartphone (using DavX) and never had any problems.