For sure, I think your projection is a worse case scenario, one that's totally in the realm of possibility.
In "non-growth" times (i.e the era we're in now (post ZIRP) and probably for the foreseeable future, LLMs being the exception), very little outside the major revenue generators is probably "core" roles.
In "non-growth" times (i.e the era we're in now (post ZIRP) and probably for the foreseeable future, LLMs being the exception), very little outside the major revenue generators is probably "core" roles.