I'm really hoping you guys will bring SeblodCommerce in the Seblod 4 Release momentum. Please please please ...*wink* I'm also hoping in the Seblod 4 version you will also introduce an easier way to create backend application for mobile phone. Thinking something like, 'Build your React Native / Ionic backend with Seblod'. This will make Joomla more useful.
should not use any feature that will be removed (-)
should try to avoid extensions that will move from Core package to SEBLOD Store when possible (even if most of them will still work it implies that they won't be the best choice at that time... of course you'll be able to edit/change fields later on, if you wish)
Also if you use Category views, I would suggest to enable the following parameter right away: Plug-in Manager > Joomla! Category Object > Routing Context > Best
And about routing, pick from those highlighted on our demo page.