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I think that from 2017 the blockchain technology develops a lot and becomes much more better that it was in 2017. Some good projects appear.
I see no fundamental differences in the blockchain technology. As for new projects, I have the opposite opinion. Many new projects look frivolous, useless, bad-quality.
I think now the situation has become better than it was in 2017. Now basically the founders spend their own money for the initial launch of the project. Another thing is that projects often lack funding, but there are fewer scams.
Scammers have become less as the financing of new projects has decreased significantly. But you can be sure that they will appear again.