That sounds like an absolute dream job. Good for you! Niches are good. I think one of the most memorable points in my career was when as a junior was tasked to

That sounds like an absolute dream job. Good for you! Niches are good. I think one of the most memorable points in my career was when as a junior was tasked to revive a highly critical production system dependent on a very sick DEC Alpha server in dire need of healing through many different partial backups. Only tangential to what you describe, but I can certainly relate to the joy you felt revivifying an aging piece of software on an old system and succeeding. Yes, I do still dabble in retro computing. :)