People in Australia have been working on adding ExtraHD floppy drives (4MB/2.88MB) to Amiga and hit a problem with the low Amiga floppy bandwidth.
Matze has successfully reverse engineered Gary and put onto a Xilinx CPLD.
STM32H750 chip interfaced with a new enhanced Gary on CPLD would allow using regular speed HD floppy drives, and the ExtraHD floppies too (with software eject support already contained in Commodore original Kickstart!)
Other features* of that STM32 chip could also be added if wrapped "inside" enhanced Gary hybrid module.
* ethernet, enhanced parallel, faster serial, SD/CF, 480Mbit USB, SPI, i2c, NAND flash, crypto/hash processor, 480MHz ARM chip with both FPU and DSP.