As soon as gravity is fixed and Dark Energy isn't taken seriously I doubt we will still hold to the proton decay ideal. I don't think there is such a thing, because simply it has never been observed. I also don't think new particles are being created, but its possibly some far off distant corner of the Universe might have some kind of white hole. One thing is certain, that is that nothing is certain. One day the laws of physics may run down, who knows, but its not today in any case lol.