My bottomline opinion: stick with 32bit for now; its still fast. Use 2 or 3 partitions to install slamd64 and gentoo and slowly transition to the best one.
Useful post from the newsgroup:
Date: Mon, Mar 13 2006 2:20 pm Email: "Mogens V." <NOSPAMmoge...@vip.cybercity.dk> Groups: alt.os.linux.slackware
Carsten Becher wrote: > what about 64-bit support(*) in Slackware? Anything planned?
Pat's answer to my Q (december 05) about Slack 64bit:
"It's possible that we'll eventually do something about x86-64, but it's not a top priority, and I don't believe that "most of the Slackers" will switch away on account of 32 vs. 64 bit support in the forseeable future, but if they do it's going to be more about an imagined benefit that about any real one. The majority of users really don't have any need for 64 bit processing at this time, but it is cool to be able to say that your AMD64 processor is running in 64-bit mode. (just like it's cool to be able to say that your binaries have all possible processor specific optimizations compiled in, even if there's no measurable performance difference and the system might be less stable overall)."