Does anyone know any AI chat apps that are free (or reasonably priced) and allow long conversations without constantly running into limits?

Why do so many AI chat apps restrict conversations after a few messages or lock basic features behind expensive subscriptions?

I don’t mind paying for extra features, but at least let people have long, uninterrupted conversations. One of the reasons ChatGPT became so popular is that you can actually chat with it properly without constantly hitting limits.

I wish more AI platforms focused on giving users a great conversation experience first instead of aggressively pushing paywalls every few messages.