Yeah, the clone mode radios are likely fine. The catch is the live mode radios, which don't have tests (for fairly obvious reasons). At some point, it would be good to come up with an approach for this, but I don't know what it might be. Stubbing out the radios doesn't help much, because then you have to test that the stubs match the actual radios, so you're just one step removed.
It reminds me of the early days of testing apps on Blackberries and other smartphones. Companies literally had a roomful of actual physical phones that testers would check out one at a time to test the apps. Not exactly ideal, and a little expensive when it comes to radios.
I'm not suggesting that something be developed at the same time that Joe is working to get Python 3 up and running, since it only adds to the burden. I should be able to test the IC-910H, but it would be good to have people check out other Icom and Kenwood live mode radios.