Oh, certainly, the Middle Ages were very long, and the system was complex enough for about anything you imagine to happen and feudal lords could and would be abusive.
As a mitigating factor, commoners had their own prerogatives and rights (limited but very real and very detailed) and were very defensive about these. This could be enforced by rival lords / the king / other overlords, and at times by peasant revolt (which could get very bloody)
The chief mitigating factor, I believe, is that your typical medieval knight, often enough farmer himself too with his own crops to tend besides his horseback riding job, and typically didn't have the time or resources to go harass the peasants, sheriff of Nottingham style.
Your example of peasants leaving the lord's land is a good example, btw -- I believe for most of the Middle Ages no one had the resource to enforce that!
It was. Feudalism arose in a time when there wasn't a lot of money in circulation, not much of an administration, so everything had to be mediated through personal trust. That's why fealty, honor and the like are such important values.
Incidentally, that's why I don't think feudalism is a very good analog to capitalism, except in the broadest sense of 'bad, oppressive system.'
I'm not sure about that. About ten years ago, I was a contractor for LVMH (that's Bernard Arnault's company, #1 on the Forbes list). They weren't exactly pleasant people or fun to work with but they were build to last a hundred years and planned accordingly.
Of course a luxury brand thrives on
Tech is different -- there's more focus on the shiny new thing -- but it's pretty clear that, say, Microsoft plans to stay relevant for another fifty years, even if they don't say so openly. Or Amazon. (Notably, Amazon just doesn't do enshittification. You can expect their services to stay there.)