Racket doesn't have much frameworks. You will probably do from-scratch
a lot more in Racket.
Any time you think "framework" from some other language, probably either
it is easy to do what you want with the Racket base language features or
a small existing package, or you will have to put substantial work into
writing a new package that does what you want (or that interfaces with a
non-Racket tool or service that does that).
One of the advantages to writing it yourself is that you can then
understand it, and make it do what you want, and not be at the mercy of
the framework and its developers. (Example: One mostly-Racket
Web&service system, with necessarily complicated data models and some
kinds of big data, was able to evolve over many years, with a very small
team, who had to do most things from scratch, and, despite this and
other constraints, it ended up being a noteworthy first among AWS
deployments.)
Of course, some things (e.g., R, a GPU ML engine, PostgreSQL) you
usually don't want to reinvent from scratch. But even then, sometimes
it turns out you don't really need, say, an RDBMS, and maybe, say, a
from-scratch replicated RAM-based object graph works much better for
your purposes.
Other times, the biggest practical drawback from doing from scratch is
not the cost of writing it, but developer career moves after. If you do
your work well, you will probably understand some underlying
technologies and system behavior a lot better than most framework users
will. But the majority of contemporary developer recruiting, after the
first post-college job, is based around commoditized specific framework
and language keywords. I'm not sure, but I suspect many employers might
also want you to say "agile", "scrum", and "bro" a lot, preferably with
an affable Californian surfer accent. :)
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