Interesting. We had to use a local repair shop recently and it was busy with lots of staff. While the kids may use smart phones for personal use, they still use computers or PCs at work. I’m glad it worked out for you and you’ve made the most of working for automated delivery services.
Less than two years later the people we sold the business to closed down
We offered same day or next day service. A busy day was 20+ repairs done by myself and my ex-wife, sometimes my daughter helped.
PC's were very universal then, power supplies, cpus, memory, hard drives, PCI devices, video cards, even motherboards were mostly inter changeable. Keeping an adequate stock was easy. Never wanted to repair tablets or phones, the parts are all proprietary. No way to sustain our quick turn around, which was one of the key reasons for our loyal customer support. In those days almost all computers were ATX or Micro ATX format, but now there are very many various small form factors that are popular.
Never wanted to charge extreme labor charges or have a long turn around time. Not sure how that could even work today, as a decent mini computer can easily be purchased for less than $150 from Amazon arriving in just a couple of days.
The last mini pc I bought (typing this on it) was an Intel Jasper Lake quad core with 16GB of memory and a 512GB ssd, $109.
I can only guess, but most modern PC repairs are most likely higher than that. So if one saves important files and data as recommended, it makes financial sense to skip the repair and buy a new one for daily use. Obviously if one is a AAA gamer or doing heavy video editing or scientific computations, maybe a repair is an option. Even so, more powerful PCs can still be bought for a few hundred dollars.