This year on February 7th, the first version of the H7-TOOL offline programmer was released, followed by hybrid programming on March 13th. Today, we have officially conquered one-to-four parallel programming, allowing for offline synchronous programming of four chips.
The video below demonstrates the H7-TOOL simultaneously programming four H750 devices with a 46KB boot + 685KB APP + 2MB QSPI.
Testing:

Previous two major updates:
(1) H7-TOOL offline programmer functionality open source release
(2) H7-TOOL firmware upgrade, enhancing offline programming, adding STM8, QSPI Flash, and hybrid programming support