More and more universities in Europe are turning to Rigol gear for their labs.
The golden years where Tektronix used to have a monopoly position in academic latitudes are long gone.
And I am convinced that the TBS series with poor specs isn't going to change anything about that.
Teachers don't care about specs, they care about course material and how much work they have to so to produce class work.
If:
a) The class material is already written for Tek scopes, they'll use Tek scopes again.
b) If Tek offer comprehensive course material with the scopes then they'll buy Tek scopes.
Tek and Keysight are the only two scope makers who offer course material with scopes and actively target this market with that.
With Rigol and Siglent et.al it's like "We have cheap feature packed scopes, what more do you want?".
Maybe that's how it works in the USA, but in Europe students are encouraged to learn by doing, and it should not be too easy either.
There are many good all-round books about scopes, so there is really no point to make a book that is targeted to a specific model of a scope. Those kind of books have no value IMO, as it is better to learn the general principles.
Students who graduate, will start working in companies where they will have to use gear from different manufacturers, and due to tight schedules, they will not have the opportunity to take a whole week in order to sit and read through the supplied user manuals
Moreover some stuff you simply can not learn from a book, and the easiest is just to start playing with it. How many engineers do actually read manuals? The same counts for those engineers while they are still student