The Xbox 360 launched in 2005 with a triple-core PowerPC CPU, 512 MB unified RAM, and an ATI Xenos GPU. Modern titles target Zen 2 / RDNA 2 architectures with 16 GB GDDR6 — orders of magnitude more powerful.
If you want 2024+ games, upgrade to Series S/X. If you love 360 classics, keep the 360 or play them enhanced on a modern Xbox.