When I think .357 Sig, I think Betamax.
Nothing wrong with it, except it didn’t catch on. Sig had been offering new pistols with two barrels standard, which I thought they were still doing. This was to support the customers who had already purchased a pistol in .357 mag, with a continuing ammo source. However, the round was so hard to find, Sig had to offer a second chambering standard, in order to sell the pistols.
To my knowledge, the issue with it being a Betamax round has not changed.
I still have a perfectly good Sanyo Beta video recorder/player. I keep it because I have lots of good video of when the kids were real little. I know, I could convert it to DVD.