Yes, not forgetting HSS and auto-TTL functions not available with conventional flash units. And it's not just having one system instead of several, it's having only one control interface to familiarise with. I don't think I'm alone in finding most remote flash control systems less than intuitive, especially in the heat of the moment. I wonder, how many of us have switched to manual, not because it was the best mode, but because we'd actually forgotten how to operate the auto flash compensation function in groups B and C, and it was easier to just walk over and turn the things down?!
I agree. Quite often, things that are supposed to make our lives easier actually have the opposite effect.
I'm not a luddite, but I do feel that we sometimes rely on technology too much, and all to often we kid ourselves that it can replace care, skill and knowledge too - TTL is a good example of this, it may, very occasionally have its uses but mostly its used as a very poor replacement for actually being a real photographer. Just recognise that it's just a bullet point on an advert, not an actual benefit for most people, most of the time.
And, like so many other things in life, technology can often cause more problems that it solves.
Right now, many cars either don't carry a spare wheel at all or they carry a little toy one - and there is now so much technology on cars that they are far more likely to break down, and if they do break down nobody knows how to fix them, or at least even if they do know, they don't have the tools with them.
But, with cars, we can get round these problems by belonging to a breakdown service, and just about all makes have a very solid infrastructure in place, with main dealers etc to sort problems out.
But we don't have that infrastructure, and don't get that support, with clever flash heads and clever flash triggers. With many of these products, there are no dealers (or none that either know or care about the product) and there's no support when things go wrong, because the manufacturer is 6000 miles away and doesn't care anyway. So, when they go wrong, the only thing to do is to throw them away.
There's another strange phenomenon going on in photography too - and we see it all the time on forums - people who talk themselves into buying gear that they not only don't need, they don't have a use for it either, and they buy it for entirely the wrong reasons. These tend to be the people who rely on useless gadgets the most, and these too are the people who never have a backup plan for when the technology lets them down.
The old Bowens flash heads of the 1980's had a great reputation for reliability, and quite a lot are still in use today. They were to some extent over-engineered back then, but the main reason for their reliability was their simplicity - performance was terrible by today's standards, but because there was almost nothing to go wrong with them, they hardly every went wrong, and if they did go wrong there was (at that time) a manufacturer who could repair them, and a lot of repairers who could also fix them. Don't expect most of the new tech products to still be going in 30+ years, or even in one year. Don't expect to be able to get them fixed when they go wrong, and don't ever forget to take plenty of backups with you, including basic technology such as sync cables are going to be needed one day.