Doesn’t a lot of the money for the research come from tax payers? And a lot of effort put into tweaking formulas with no real impact just so they can extend the patents? And then they jack up the prices to insane levels so that those tax payers cannot even afford the results anyway… The system is broken and massively abused. It needs to be changed. We might need something to help foster innovation but the current system just stifles it far more then it helps.

It could be a tight bend in the line somewhere - make sure there are no tight bends. Otherwise if it is the tube then get a thicker tube.

It might. Depending on how much tension there is. Too much and it will cause the filament to slip in the extruder causing under extrusion. If you are not seeing signs of under extrusion then you are fine for now - but that might change if you change filament or anything else. I would try to lower how much tension the filament is under to avoid problems in the future. Otherwise it would be something to keep in mind if you do start seeing signs of under extrusion.

They should also be required to support it for X (exact time is up for debate) years after they stop selling it so you have some minimum amount of time that you know the device will be supported for no matter when you buy it.