When comparing Slackware vs Windows XP, the Slant community recommends Slackware for most people. In the question“What is the best laptop OS?” Slackware is ranked 13th while Windows XP is ranked 40th. The most important reason people chose Slackware is:
Uses stable, plain-vanilla packages from upstream.
Specs
Ranked in these QuestionsQuestion Ranking
Pros

Pro Stable
Uses stable, plain-vanilla packages from upstream.
Pro Strong adherence to UNIX Principals
Pro Ideal to learn more of Linux
Follows the original Linux roots. It still sees Linux as a free clone of UNIX so the distribution tries to be UNIX-like.

Pro Package management
Uses standard tar archives with shell scripting as packages.
Pro One more distro which is init based
Some users don't like to install systemd based distros because they increase booting and processing speed.
Pro Oldest surviving Linux distro
Besides Debian (which was first released in August 1993), it is the oldest still maintained Linux Distribution and was first released in July 1993.
Pro Super fast
Pro No systemd
Pro No Bloatware
Unlike its next gen, this OS has no bloatware included.
Pro Fast
It loads very fast, recommended for older hardware.
Cons
Con Not user-friendly
It is made to be KISS (keep it simple, stupid), so you have to do everything by hand.
Con Large size live ISO
One needs to vain 3GB+ data for downloading one slackware ISO.
Con Narrow repos
Doesn't offer the same amount of options as other distros do.
Con Niche/small community
Slackware is its own niche and has a small community.
Con Very slow release cycle
Hasn't updated in 3+ years.
Con Dependency issues
When it comes to dependencies, Slackware shows more issues than many other distros.
Con Discontinued
Since April 8, 2014, support and updates for Windows XP are no longer available.
Con Absolutely absolete
It is just sort of a mozachism to use this os.
Con No software supported anymore(Almost)
Con Linux Zorin Lite is a much better alternative
Con Unsecure
Discontinued updates, after 8 years hacking it is a piece of cake.
Con Garbage, ancient, and slow
