It is technically possible to contribute to a traditional IRA above the point where you can deduct the contribution. It would be nice to have an option to set up an IRA contribution that automatically adheres to the US contribution limits, but stops counting as a deduction beyond the income limit.

This would help with being able to model the first step in a backdoor Roth conversion without immediately paying the tax to convert the money from traditional to Roth. Then, it would be possible to experiment with converting or withdrawing in future years where income will be lower.