How much usage difference is there between the $20 plan and the 100 plan right now based on the recent updates?

I’m considering upgrading from the $20 plan to the $100 plan and trying to understand the actual difference in value, particularly when it comes to Codex usage limits. Right now, I effectively get about 6⅔ five-hour usage windows per week, plus whatever usage allowance resets with each window. I’m generally happy with the results I’m getting on the $20 plan, but having more usage available would definitely be beneficial. What would the $100 plan realistically give me in terms of additional Codex usage? Would I get significantly more work done before hitting usage limits, and how much of an increase could I expect compared to what I have now? I’m mainly trying to determine whether the additional $80 per month would provide enough extra capacity to justify upgrading.