Speaking as one of those people, dongles don't bother me in the least. You're absolutely right that many peripherals are prohibitively expensive to update just for a connector, but they're also bulky and usually already involve lots of other cabling, so adding a dongle really doesn't make a big difference. Plus we're all used to having dongles just to hold license data anyway (thanks, Pro Tools), not to mention the menagerie of adapters that have been a way of life for decades in the audio world.