It seems you're asking for a review of the firmware. However, that appears to be a mainboard/chassis code (likely for a TCL or RCA TV using an MS801 platform with an MStar/MediaTek chipset), not a specific firmware version name.
Skipping these updates can lead to more than just missing out on new features. Over time, outdated firmware can result in "brick" scenarios where the hardware is fine but the software fails to load, necessitating a complete reflash of the flash memory on the motherboard. How can I update the software of the TV? - TCL 40-ms801a-mac2hg firmware
: Release the button once you see a blinking LED on the sensor or an "Updating" progress bar on the screen. Do not power off the TV during this process, as it can permanently damage the mainboard. 40-MS801A-MAC2HG It seems you're asking for a review
: Ensure the firmware file is correctly named and placed in the USB root. Power Down : Unplug the TV from the power outlet. Insert USB : Plug the drive into the TV's USB port. Over time, outdated firmware can result in "brick"