And that's why "free markets" will never solve this. (And that's whether the "free" in free markets means freedom from regulations, or freedom for people to participate in the market).
IMHO this is why the European system of strong regulatory bodies tends to work better than the US system of "wait for a customer to experience damages, then recoup through the courts, and then the companies learn their lesson."
A competitive market isn't a marry-go-round where every idea gets its turn under the sun for all eternity. It's an arena where some rise and many perish. In the '90s and '00s, many ideas fell through, many companies collapsed, and many technologies become outmoded. What has come out of that is the sealed computer of today.
I have. I note that large numbers of people build PCs from components and that this market is large enough to be a primary concern for a constellation of manufacturers and has been for decades. You can buy an IC with 1200 contacts and install it yourself on the kitchen table. There is no other segment of the microelectronics world were this level of commoditization exists and yet it has stood the test of time. Transferring this behavior to mobile machines seems like an inevitable and long overdue step to me.
"Historically laptops were never as repairable as desktops."
History is a poor yardstick here. A number of forces have emerged that change the landscape. Among these are amazing design tools that enable a startup to go from zero to a complete, shipping modular design in 18 months (establishing a defacto standard, btw), tooling that delivers rapid fabrication in small volume, standardized, high performance serial busses that enable simple yet powerful architectures, robust solid state storage devices and the integration of some difficult components into CPUs. It used to require the resources of major manufacturers and their proprietary knowledge and capabilities to pull off marketable mobile designs. That era has passed and the commodity era is here.
"The adhesive-sealed laptop that you resent"
I do not resent monolithic products. I own several. I will buy more. I resent the lack of a choice. I expect that modular mobile machines will take their place among the equipment I acquire, and that these will become the major focus of my concern, whereas the monoliths will be relegated to ancillary tasks.
"What has come out of that is the sealed computer."
And they won't go away. The question is how much room is there for modular systems. I believe there is a lot. I imagine a Newegg filled with commodity mix and match mobile components from a vast number of vendors.
Time will tell.
There's already no "standard" laptop design, just a set of desirable properties people want. And there's already no push to converge; there are many laptop vendors. There's plenty of room for a new vendor with different priorities (like modularity); there's more room for such a vendor than there is for one more undifferentiated vendor.
However, people do keep in mind this still may not result in better third-party repairability - it may be things like easier reclaiming of components off of boards by the manufacturer to put into refurbished swap-out units.
That just leaves you with entrenched companies doing the bare minimum for compliance, and lobbying for loopholes to protect their own market positions.
Maybe they think they don't until one piece of their MBP fails and they have to pay Apple to replace 90% of their laptop.
* analysts consider whether the cost > profit, if not then continue doing the same thing as before.
People care about Right To Repair; that's why the FTC has been pressured into action recently on the matter (not that I entertain any hope that that bunch of bought-and-paid-for bureaucrats will actually achieve anything.) Framework has blown a vast hole through the false arguments offered in opposition. One must simply care. That's all it takes. Every manufacturer that has opposed RTR has the means and talent to do at least as well has Framework has done, and probably better. They just don't care.
Thankfully the vestigial remains of our free market are sufficient to run the experiment.