426 stroker, is it reliable?

Most people building strokers aren't likely to get 20000 miles on them before rebuilding for performance or out of boredom. I doubt I'll get to 10000 before I rebuild my 416. I only have 3000 miles in last 3 years, doubt I can manage to go 6/7 more years before I'm bored and want to make some changes. I'll venture a guess that no one with Strokers are daily drivers, or anything more then Sunday cruisers or track cars. Worrying about how many miles you'll get out of a stroker build is like worrying about whether you'll get good gas mileage as well.
As far as why a stroked small block? Cause they are friggin cool, and anyone can get 600hp out of a big block, getting that out of a smallblock is more of a challenge and fun to try. And like mentioned, it just makes life easier then shoehorning a big block under the hood.