I definitely agree with this article your colleague wrote. Backstage is becoming synonymous with IDP but that doesn't mean we can throw Backstage at every IDP problem and it solves it. We at Okta Platform Team, tried to use Backstage as the "frontend" wrapper for our internal AuthN/AuthZ, CI, DevEx tooling and realised we were writing more "glue" code to just adopt Backstage rather than actual work.