TO LOAD THIS PICO-8 CART in immediate mode, type: load #newfont2021
After some very thorough digging I did manage to find a few Piconians making use of the new ability to change the system font to another, yet none of the explanations seemed really simple to follow.
So once I finally understood - I thought I would toss my hat into the ring to show an easier way to replace the default 5x3 font with a new 8x8 font - which is included. See the source for details.
And it's not using SPR() or SSPR() but PRINT, so it really is a true font replacement ! And you have the ability to plot it in color or make use of the new P8SCII codes on it if you so choose.
https://pico-8.fandom.com/wiki/P8SCII
To type in lowercase for PRINT, use CTRL+P, a notice saying PUNY FONT will appear and then you must hold SHIFT to type back in uppercase. Press CTRL+P again to leave Puny Font mode - and you are back.
Hope This Helps !