Proceed with caution. Use trusted sources, scan your files, and consider supporting Hello Games—they are one of the few studios that actually act like they love their community.
However, the reality is that No Man’s Sky respects its players. The "Full" experience is available officially for a reasonable price, and the developers continue to drop massive content patches at zero cost. no mans sky switch nsp xci update eshop full
Hold onto your XCI dump of the cartridge. The physical Switch version of No Man’s Sky will be a fascinating time capsule of how "impossible ports" dominated the late Switch lifecycle. Proceed with caution