In the old transmitters, where you had to pair each time - lot of manufacturers had issues
Suunto on the Eon when they moved to the Pod in 2014/15 switched to the paired for life, which PPS did soon after. The only transmitter problem I've ever had was a battery failure - all down to me.
I really can't get my head around the SW worship cult. Sure they're good computers, I have an Perdix AI as an alternative to my Eon - I prefer the Eon it has less annoying features..
I get Suunto had some historical issues but. Ford build the Pinto yet people have forgiven them...
I bought my first dive computer (an Oceanic Atom 3.0) at the end of 2014, with a transmitter. It was New Old Stock, so it had been out for a while, even then in 2014. I think the Atom 3.1 was already out by then.
It had the same type of pairing then as they do now. That transmitter still works - and works just fine with my Terics and NERD2.
I attribute the Cult of Shearwater to a few things.
One, they have offered the algorithms that tech divers want. In contrast, just for example, Suunto has not, historically speaking.
Two, the Mortons, aka Dive-Tronix. I don't know that Shearwater products are actually any more trouble-free than any other brand. I've had 4 battery replacements between my 2 Terics. I just had the pressure sensor in my NERD2 replaced. I had 2 Shearwater-branded AI transmitters replaced. That is all in the last 2-ish years. And in every case, I never missed a dive - because of how quickly Dive-Tronix took care of every issue.
And that is not to take away from actual Shearwater customer service/tech support, either. They are also great. How many posts have I seen that boiled down to "I emailed Shearwater about this problem and they sent me a replacement strap/pin/Bluetooth dongle/whatever immediately, at no charge."
I think that level of customer service has been the difference between loads of divers posting "my Shearwater broke and it ruined my trip" and (what actually happens) "my Shearwater had an issue but their customer service took care of it immediately, I didn't miss any dives, and I love Shearwater."
That is why I would pay more for a Swift transmitter before I would buy a non-Shearwater PPS transmitter. When my previous SW-branded transmitter broke, I emailed Dive-Tronix and had a replacement in my hands 2 days later. What other manufacturer supports their customers like that?
Three, this is ScubaBoard. It's a US-centric board with mostly US-based divers. I am skeptical that the CoSW is so strong in other countries - places that don't have the easy access to the fantastic service that we get here. In other words, when you're on here, the Force is STRONG with the CoSW. But, in the grand scheme of things, "here" is a pretty small population.