I work on things solo, up until the point where I have things in a state/condition where I can hand over .tbl files to people who can do JP/EN translation without worry of text expansion causing problems (if possible/applicable). I work at my own pace, because of health issues and lifestyle -- jobs tend to take up a lot of time, and when not at work, you don't always want to spend every waking moment working on romhacking things. There are many of us "old-school" romhackers that do things this way, and going into all the reasons I think would be off-topic. I think as many of us get older, real life begins sucking more and more energy out of us; you go from feeling like you can do anything/everything to being more selective.
Again: I'm not upset that this game got completed (I'm super glad! It's a fantastic title that I wish had gotten a real NA/EU release, and I look forward to trying the patch!), it's just one of those things where when you work on something for a long time, doing lots of reverse-engineering, hoping you can get it into a state where the translation phase can begin, only to find out someone did it first... it makes you go "dang it, had I known, maybe I would've spent my time differently". I guess the "had I known" part goes both ways though; I hadn't thought to see if anyone was working on it, and that's totally my fault. I don't want my comment to sound like it's a jab at the folks who worked on it.
As for not on RHDN: most of my time was spent on the nesdev forum. RHDN forum isn't *that* new (in the grand scheme of things, considering how long I've been online). Do you remember The Whirlpool/Donut? I was on there and nesdev, those were the primary forums for me. Given what I do/my background with all of this stuff, I really can't be everywhere at once (at one point I tried, it felt like a 16 hour a day job).