I can second that, I’ve been using seafile and Baikal for about a year now coming from next cloud. The systems are so much smoother and less resource hungry. Next cloud is good when you have a small company, which I don’t think applies to many self hosters. I have everything inside a docker compose setup, so everything from backups to updates is much easier, and with a nginx proxy and proper network isolation I don’t have security concerns with running smaller tools such as Baikal on my machine.

Have you tried OSMand? I used it for navigation by foot and car, and in many cases it has equally nice public transport as gmaps. Otherwise I only use the local apps from each provider, so WienMobil and Scotty for Vienna/Austria for example, because google does not know about outages or disruptions in many cases. But that’s my experience in Europe, so your mileage may vary.