Even better, external NVMe SSD enclosures over Thunderbolt 3 can reliably read at 2500 Mbps and write at over 1500 Mbps. That's faster than internal SSD R/W speeds a few years ago. The newer generation of enclosures coming out claim to use the full bandwidth of USB4, 40 Gbps, and get >3000 Mpbs R/W.

Neither this nor an external SSD are very practical - ask me how I know.

Meanwhile NVMes are a dime a dozen, and some laptops can fit two.