We started a redesign of our site recently, didn't want to use Slate because of lots of bug reports. Decided instead to use this Naked Theme:
It's pretty much blank, has basic functionality. Then we just decided on using the Bootstrap Grid and doing everything else manually. Working out swimmingly so far.
How about another Shopify tool - Theme Kit ?
You can use it for local development and also create a clean Shopify theme with theme new command.
Hope, this tool will help.
Let me know if you have questions about it ;)
Theme Kit is a part of Slate, but also a stand-alone tool for Shopify developers.
I used it for several projects, and all was fine.
Also, read Gavin Ballard book about theme development - https://www.apress.com/cn/book/9781484226407
In my case, it was helpful when I learned theme development basics.
Hope, it will work in your case ;)
I agree, an official statement from Shopify would be appreciated. I used to use Theme Kit years ago and was about to switch to Slate.
After some research I also think that Theme Kit is currently the best option to use but an official statement from Shopify would be appreciated