Nope, no regrets.
It was nice to have a final drive in the GR, but the weather made it much more of a task then it should have been. There were far too many squeaky bum moments considering I only had to drive it an hour to deliver it. Standing water + Range Rovers + Old school country walls
For me the Supra meets my needs and, although not quite as rare as the 86, the Supra still isn't a common sight.
It was also nice to sell it on to someone that already had a GR Yaris so gets the 'GR thing'.
It's an interesting market at the moment with the 86 prices being over list and the Supra prices starting to come down, especially on the first years.
There's a 2 litre Supra on motor point on a 72 plate for £40k, and I've seen multiple examples of the 3litre a few years old going for between 40 and 45k. So at the moment, if you ignore the tax premium, they are a fairly comparable car, at least price wise depending on the old vs new debate.