Is it worth getting 128GB MacBook Pro? Will it ever be comparable to today’s frontier models for coding?

An iOS app developer, currently using Cursor+Claude for assistance, is considering a new MacBook Pro with 128GB RAM to run local AI models. The developer questions if such a machine, despite its high price, could ever rival the capabilities of current frontier models like Claude for coding tasks, even if it remains significantly slower. The developer seeks input from users with this configuration regarding its practical utility.