I agree. Lilienthal showed a proof of concept. The Wrights made it practical. As soon as aerodynamics was understood a bit better, there was enough lift, to move the whole elevator assembli to the back of the plane, but apart from that, the whole thing still is the most practical approach.
Again, the world is not black and white, only.
Not really. If I don’t buy any real estate, I can afford to invest into other things. I could make monthly investments into a MSCI world ETF, for example. After a couple of decades I will have 0 debts and a lot of funds. And selling funds is easy and can be handled very flexibly (selling funds for amount x is trivial). If I buy real estate, by the time I retire I will have a house, worth 400.000€ or so and 200.000€ of debt or something along those lines. That might be better on balance, but it is a pain in the ass. You safe money on rent, but you pay interest instead.
In Germany they are relatively good for tenants. Can’t complain. Rental contracts are typically indefinite. The landlord can also not raise my rent at will or get me out without a good reason and a very generous grace period. But on the other hand, I got a new gf and might need more space and some garden, etc. We will see. I have some considerations to do.