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

I am a long time iOS app developer. In the last year I have been using Cursor+Claude/others to assist with app development. I am concerned that the current low pricing will disappear eventually. I am pricing out a new laptop with the intention of using local models instead. New MacBook Pros can be configured with 128GB of ram, but obviously the price is high. Will such a machine ever be comparable to what Claude can do today? Even if it is still significantly slower?

I am aware that the price of that much ram would buy many many tokens but I plan to use the laptop for several years, so even if the payback is 5 years worth of cloud AI it’s worth it to me.