I vote yes.
My reasoning, however, is pretty harsh, so if you're offended, well, I don't really give a sh*t. if you disagree though then thats fine.
Basically, the way I see it is that in my 3 years of DYOM, the users who can speak English well produce higher quality missions then those who can barely form a coherent sentence. Don't think I'm generalising, but It's more to do with what I've noticed over the years. I'm not doubting there are designing with very poor grammar that can't produce missions. I don't know what the reasoning of this is, perhaps they have trouble understanding the potential features of DYOM and bug fixes that they try reading up on. Or maybe their are just a lot of inexperienced players who happen to be foreign, I mean most of the people here don't even have English as their first language. I'm one of the few who doesn't know multiple languages.
This same group of people also seem to commonly have ignored the new DYOM SL/MP rules that Secrenom implemented. The "must upload a mission every four days" or "upload 8 missions at a time" rule went over the heads of many foreign designers who likely didn't understand the rules or just ignored it.
Now, notice how almost every contributing member to the DYOM community who can speak English well has embraced the changes that has gone to DYOM over the past year and have produced high quality, or atleast effortful missions. Even people who visit on and off, they understand the rules and standards and can embrace the changes.
Now, if these same people can accept the potential upcoming change and upgrade their DYOM to Undergound then, hell, will there be any poorly made, barely coherent missions on the new transition? Taking into consideration, that, looking at the past, the same people who ignore the rules and regulations of DYOM as those who upload poor quality missions, will likely ignore this upcoming transition and be left to edit in the outdated, regular San Andreas.
That being said, I'm always welcome for people who design in different languages to make missions in DYOM. So maybe if this change is implemented then we should consider ensuring that we inform the community of the changes in different languages. It's just mainly the people who speak very poor English. Besides, we're still able to play their missions, It's only that their not able to play ours. My main point is that the DYOM community would be much stronger if we were to upgrade to Underground.
People with poor computers is the only thing I'm doubtful of. People who design high quality missions might be left in the dust and it would be unfair for them. I, myself, have a poor computer but I'm willing to give it some upgrades for the sake of Underground. That is if San Andreas and Underground would be able to run on a Mac, which, in that case, I'll just use that. (Anyone know if it would run well on a Mac?)