4 player team is one thing, the squadrons more or less were the proving grounds for the current duty support. An 8 player raid is another matter entirely

So, the technology exists, they've tested it out in a major MSQ story point in Endwalker, and I expect SE to start converting 8-person MSQ trials at some point starting in the next expansion.
Id agree there, my guess is they want to get duty support in place across the board first.