Binding Freedom

You're right inserts are much more substantial than coils and they work exactly as advertised but it's not quite as simple as quickly moving the bindings and just screwing them in.

Firstly, look at the heel piece of your binding. The piece that screws into the ski is usually a plate with a track for the heel-piece to connect to, that means that you would need to readjust forward pressure every time you move the binding over. If you used to work in a shop, that's no big deal but it does take time and you'll need to be precise each time.

Next is what I consider the biggest issue with inserts, brakes. I'm assuming you want to insert a narrow ski and a pow ski, so you'll need two pairs of brakes. Replacement brakes aren't cheap, they're a minimum of $30. Traveling with spare brakes and somewhat frequently changing them over is an easy way to break your brakes, the "connectors" are always kind of fragile.

Lastly, the cost just doesn't make sense if you sit down and work it out. ~$30 for the inserts, ~$30+ for new brakes, plus mounting two pairs of skis with inserts (I know some shops that flatly refuse to do these mounts and others that charge a lot more than normal mounts). That's $60 (minimum) in hardware without factoring in the cost of new brakes is you break a pair and probably $100 (minimum) in mounting costs, so the low end of a insert setup is $160. Just buy new bindings at a shop that will mount your purchase for free. Attacks and Griffons can easily been found for under $200, buy those and you'll save time and probably money.

What bindings are you running?

I think it would make sense at least with Attacks, the brakes take 2 seconds to swap and forward pressure is quick to dial in as well.

You could take two pairs of skis with all outerwear, a pair of shoes etc. in a low profile ski bag, throw your bindings in a boot/helmet combo bag and everything else you need for an extended vacation or travels in a ~40L pack. Light fast travel is the way to go imho.