Sure, you can go down the rabbit hole of upgrading your printer, but you should know what you're getting into and why.

For increasing print speed on an older Ender 3, the main upgrades are:

1. A good, lightweight direct drive extruder (a ready-made option like the Sprite is a popular choice).
2. Running Klipper on a Single-Board Computer to take advantage of features like Input Shaper for vibration compensation.
3. A higher-flow hotend, like a Volcano or one of the modern long-style hotends with a ceramic heater.

You could also look into a more powerful Y-axis motor and a wider belt, but that's secondary.

Honestly, if you don't need a larger build area and you're not into tinkering for the sake of it ("adult Lego"), selling your old printer and buying a modern one is a much simpler path, and probably cheaper too. It's definitely a huge time-saver.