As I said, I recommend building ideas and if you see traction then build it outside bubble.
Yes, I’m still using bubble to build non-complex apps and ideas to validate or reject.
Please note, back in the day we didn’t have plugins that can provide some performance improvements like algolia etc…
There are some apps that can work on bubble and some that can’t. It seems to me that the performance issues all arise from Data Calls, if you are using private data that has privacy set they will load fast, so building a closed SAAS platform for management of a business can have much better performance than building a social media type app whereby you want users to access a feed that has million+ data in it. That will load slow.