Time.
It's the most valuable asset in the world.

For a segment of the market, they'll pay someone else to to do it for them.

Most Pro's in the industry don't want to waste their time with DIY gear as there's little value add or profit vs a whole lot of maintenance and client support required.

For the person with time, and know how, the DIY stuff can be pretty good.
Limitations, absolutely. And money and time will be wasted along the way, having to replace the wiz bang thing that didn't perform/failed/vanished.

They may also have less time available later in life, and may hire a pro the second time. Or the worst case for the industry will be they forgo due to the mess they lived with the first time.

Our job is tougher today, explaining the pro's and con's, and many will under buy not understanding the advantages and value of the avr/better network/control/speakers/amplifier etc.

Vendors have already begun to pick sides, the giants are just too big to win against. Installers will need to as well, or divide into two, the level of response, service, and support are not the same on both sides of the fence. This is the elephant in the room.