That is a good point.
STIHL parts are only available from local STIHL dealers (which helps keep dealers open and avoid knock-off parts, so not necessarily a bad thing, but if there's not a local dealer around Internet prices for reselling STIHL parts are going to suck), shop manuals are only available to dealers, so if a saw owner wants a shop manual it's doable but difficult. Labor on saw repair...yeah, you want to do that yourself, so you see the conflicts. The M-TRONIC computer hookup is proprietary and requires Internet connection to corporate, the module
was expensive and since STIHL just doubled the OEM price the aftermarket price jumped also. Usually the module is not needed, so far STIHL lets anyone connect to corporate without issue though that could change any time.
Husqvarna is fine with selling saws and parts over the Internet, though since their move to China-based factories the prices jumped and quality maybe slightly lower, depending. From what I understand Husqvarna stopped releasing chainsaw manuals around 1981, so it's like STIHL in that regard. Husqvarna was first with electronically controlled saw ignitions and they were so good that STIHL licensed the technology, and managed to screw screw it up for a few years, then figured it out. From what I understand, Husqvarna, unlike STIHL, will sue you for
their module if you're not an active dealer and they find you have one. It also requires and Internet connection and won't work without entering a dealer code when I last looked into it.
ECHO saws and parts are available on the Internet for reasonable prices (they were flat out cheap, COVID changed that). If I remember correctly, a saw shop manual used to be listed on the product Web page and freely downloadable, even if you did't yet own the saw, though my memory could be wrong; currently I see they list the Parts Manual. They don't have electronic ignitions nor fuel systems so there's no computer hookup. The saw designs are about 20 years behind industry leader Husqvarna so they weigh more, have less power, use more fuel, and are less expensive, reliable, and "relatively" easy to fix.
Husqvarna has in my opinion led the way with interesting saw advancements, STIHL refines them to perfection, and ECHO avoids them and sticks with proven simple designs. Husqvarna has the most power, STIHL uses the least fuel*, ECHO has the most bang-for-the-buck.
*MS400 gen.1 & MS880 series excepted, those are powerhouses.