I am curious about this for a couple of reasons.
We have all dealt with a site who switched platforms and didn't plan properly and now have 1,000's of crawl errors. Many of the developers I have talked to have stated very clearly that the HTacccess file should not be used for 1,000's of singe redirects. I figured If I only needed them in their temporarily it wouldn't be an issue. I am curious if once Google follows a 301 from an old page to a new page, will they stop crawling the old page?