That means you've purchased about 10 laptops at most during that 20 year timespan.
If, hypothetically, laptops have a 2% failure rate by age 5, that means you had an 81% chance of never encountering a dead laptop. With these hypothetical numbers, your experience is not extraordinary or indicative of an incredibly reliable brand.
The other thing that skews statistics in your favor is that you would have never bought a for-parts laptop. I.e., you buy a 3-year old laptop, which has a survivorship bias because it is currently working at time of purchase. You wouldn't actually buy one of the ones that broke between years 0-3 [1] and hasn't been repaired yet. Even if the failure rate by 5 years is much higher than 2%, your probability of experiencing a failure is still higher than if you had bought the computer new and kept it for 5 years (compared to buying a working system at 3 years old and selling it at 5 years old).
We can't actually guess your preferred brand because it's likely that 100% of consumer laptop brands last 5 years have a single-digit percentage failure rate.
The 3-year extended warranty for a Framework 13 costs $139 and the cheapest pre-built configuration costs $988. The warranty cost scales with part selection (e.g., configure the system to max it out at over $5000 and the warranty cost is now $259)
The industry average gross margin ((revenue - COGS)/revenue) is 40%
I'll take a "typical" configuration of the mid-tier AMD CPU, 1TB storage, and 16GB of RAM, pre-built cost is $1774.00 (no OS). 3-year warranty cost is $209.
We can assume the raw cost of the laptop hardware is approximately $1060, although that's without any consideration to operating overhead, shipping, etc.
That means if Framework's complete replacement failure rate at 3 years is higher than the ballpark of 10-20%, that extended warranty loses money.
That's a pretty high failure rate, but we have to also recall that extended warranties have about a 50-70% profit margin across the electronics industry.
I think our napkin math here generally aligns with the idea that the amount of consumer electronics that fail within 3-5 years or so is somewhere in the single digit percentage range.