I agree with some of the above posters, It's time to clear out 32bit and move on. I'm a programmer for a large 3D CAD company and we have been pushing the use of 64bit for ages. Any programmer worth his salt should be able to make any code work in 64bit.
The 64bit machines should last quite a long time, But one can never say for sure how soon 128bit will be needed or if something different will come along before that, but I say the sooner everything is 64bit the better.
If making Firefox 64bit breaks a load of plugins, then those plugins need reworking, If the programmers of them can't be bothered then the plugin will die, and rightly so.
Viva la revolucion
totally agreed.