Tradfri has several different models, and some of them, at least, do also run locally under the old architecture and do already have a stock edge Driver in the smartthings beta channel.
The only issue with those is that some people (not all) are finding that the batteries only last a few days. Nobody is 100% sure of what the problem is, particularly since it doesn’t affect everybody. But it’s not a smartthings issue: it’s happening with other home automation platforms as well. There is some suspicion that it may be a routing issue, when the button tries to reroute through certain repeaters, it gets confused, and start sending “verbose” polling responses, which use up its battery. There are several threads in the forum about this issue.
Here’s one:
Ikea 5 button remote killing batteries
And
Ikea Battery Issue Hub Poll (2021)
My recommendation would be to buy one or two, try them, and see if you run into the problem. So just be aware that it may happen. 