Also, Trilium don't have mobile app which is very important for having notes available 24/7. Browser version don't allow offline access and not as convenient as an app
That's correct, there is no official mobile app with full offline sync at the moment, but there are independent efforts underway¹ and more or less involving workarounds².
If you have internet and don't need full offline sync, you should be able to use Trilium decently well today, with the recent responsive theming efforts that went into Trilium Next.
