Spyder is the reason I could become Computer Scientist.
When transitioning from MechE -> CS, every programming interface felt unintuitive and daunting to set up. Spyder made it so simple to get started. It turned python into a Matlab-esque numeric computing interface, got out of your way and let you built whatever you wanted. It reduced the 'time to magic' like no other tool I'd tried. (Can I coin the term : 'time to magic'?)
If I had to setup PyCharm on day 1, I'd never have gone past the my first barrier. Before jupyter & colab, there was Spyder. It remained my trusty IDE for a full year until Jupyter notebooks & VsCode came around.
Even though the term "time to magic" has already been coined, it think it's the key, pivotal, lynchpin thing. Making the time to magic short is what makes or breaks a product's adoption. Products with a very short time to magic win, despite whatever other technical flaws they may have: PHP, Twitter, and Docker are all great examples.