The current M1 Macbooks are not for the professional market, you call them entry-level notebooks, but will you position them in the professional market? In addition, they can indeed handle more than 1 external screen, I’m typing this on an M1 Macbook Pro with 4 external screens…
For the professional market there are still Intel Macs, which are certainly still widely used. Yes, there is a cooling problem but this is just one of the reasons they are switching to ARM (even my developers on Windows machines suffer from fan noise when they compile). Keyboard has already been addressed on the latest models, connections are just coming back if you are to believe the rumors about upcoming ARM macbooks, screens have always been very good at Apple, certainly of the more expensive models (the Air is one of the models with a worse screen, but is ok considering its target audience).
Some of the criticism you list here has already been addressed and the rest will be resolved this year. Then stating that they have no eye for the professional market is therefore lacking a good foundation, although you are partly right in my experience (I have been using macs professionally for 25 years).
You’ve seen for about 10 years that Apple doesn’t really take the (high-end) professional market seriously anymore, in my view, since saying goodbye to the Xserve (of which we still have a number of them running here). For most professionals, however, a Mac is still more than sufficient, professional is therefore a very broad term.
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