People often ask: how do I find business ideas?
Well, here you go: many people publicly saying how they love a product that is going away.
This is a validated product: people were paying for it. Apparently quite a lot of people. It doesn't get better than this.
All you have to do is to clone the product. You can literally market it as a Pivotal Tracker clone. It's not like VMWare will care.
You can research companies currently using Pivotal Tracker and build a database for cold calling / e-mailing when you have the product.
It's also a product that is doable as a single person or very small team. With modern technologies (React or Svelte, hosted databases etc.) it's relatively simple to clone.
Staying small is important: those businesses topple over when revenues don't justify expenses, especially if VC funding is involved and VCs are pressuring for going big or going bust. Or when a profitable product is acquired with the hopes of growing the profits but they don't grow.
Stay small to keep expenses in check and you can build a profitable company.
This is a bootstrappable business: a $100/mo Hetzner box, backend in efficient language (Go, C#), front-end in Svelte or React and you can serve lots of customers. The rest is your time and hustle.