First-order effects

• Linux users who move their Steam folder lose not just game installs but their entire file systems, turning a routine disk-management task into catastrophic data loss.
• Valve faces immediate pressure to patch the client's delete logic and to advise users against folder moves until the fix ships.

Second-order effects

• The incident hands ammunition to the case that SteamOS-era Linux gaming isn't ready, compounding the performance gap documented by Ars and giving skeptical gamers another reason to stay on Windows.
• Distro maintainers and packagers get drawn in, since a third-party client capable of wiping file systems raises questions about how much privilege Steam should hold under normal Linux permissions models.

Third-order effects

• If data-integrity incidents keep recurring around Valve's Linux stack — as they did later that year with the account-caching flaw Valve had to fix — the pattern becomes a structural tax on desktop Linux gaming adoption, where each high-profile failure costs disproportionate trust given Linux's small desktop base.
• For Valve, sustained SteamOS ambitions depend on treating its Linux client with production-grade QA discipline rather than hobbyist tolerance, or the platform layer it controls becomes the bottleneck of its own ecosystem.