Used 1L mini PCs (EliteDesk, ThinkCentre Tiny, etc.) with i5-8400T/8GB/256GB go for $50-100 on eBay. You get x86 compatibility, NVMe support, real Ethernet, and no thermal throttling. Running an EliteDesk 800 G4 with 2.5GbE adapter and 2x2TB NVMe for home server duties. Draws ~15W idle, handles everything I threw at it. The Pi would need USB adapters for any of that. Pi still wins for GPIO projects and actual embedded use. But for "small Linux box" use cases, the used business mini PC market is tough to beat.