It's soon depending on your requirements, but Shoelace is forward thinking and will only become more useful and relevant as CSS Grid adoption rises. As for Edge, it's 100% as of 16.
If you're developing sites for circumstances where you can control what browser clients use, fine. Very few sites developing in that situation.
Edge 16 hasn't been released yet.
I look forward to CSS Grid being widely available and in the meantime degrading gracefully in non-supporting browsers is often viable. My concern is for the users of sites developed by the many people who do not give any thought to how their site performs using anything other than what they personally use.
