I wish there was a somewhat rigorous way to quantify reliability of tech products so that we could conclude if tech on average was about as buggy in the past.
I mean I also feel that things are more buggy and unreliable, but I don't know if there's any good way to measure it.
This... This is quite quantifiable
Flash forward to today. I can't remember the last time I replaced an ignition system component. I still don't know how they work. I can guarantee that the techs who do occasionally replace them at the dealer don't know how they work. But the whole system is so much more reliable.
That said, I do wonder how young people are supposed to learn and gain understanding in a world where they cannot possibly understand the components in complex systems. Back in the day (I know, yelling at a cloud), I could actually understand how a set of points and a distributor -- or a even a three-transistor radio -- worked.
Another thing is that today, you receive updates. So bugs get fixed, new bugs get introduced, it makes it harder to track other than "well, there are always bugs". Back then, a bug was there for life, burnt on your CD-ROM. I'm pretty sure software shipped on CD-ROM was a lot more tested than what we deploy now. You probably wouldn't burn thousands of CD-ROM with a "beta" version. Now the norm is to ship beta stuff and use 0-based versioning [1] because we can't make anything stable.
Lastly, hardware today is a lot cheaper than 25 years ago. So now you buy a smartphone, it breaks after a year, you complain for 5min and you buy a new one. Those devices are almost disposable. 25 years ago you had to spend a lot of money on a PC, so it had to last for a while and be repairable.
[1]: https://0ver.org/
My comparison points: Fallout 3 being a shitshow of bugs on release vs Final Fantasy 7 Remake & Rebirth feeling practically bug-free on release. In fact, I don't think I hit any bugs in Final Fantasy 16 either.