I think gear needs to be substantially better than all other sources to make it worthwhile. I haven't raided mythic since legion other than a few P/U raids for mythic in BFA and even then I lost interest. The big issue with mythic raiding these days is bosses are over complicated. There is a very fine line between still fun and this encounter sucks. Wiping to over complicated bosses for the sake of being completed is not enjoyable.