R8000 in a boot loop after failed firmware update attempt, unable to get into recovery mode

I attempted to update my R8000 router's firmware via its web ui which failed (I was on wifi). Ever since then, the router has been in a constant reboot loop. I'm unable to perform a tftp since I can't get it into recovery mode. I've tried 30-30-30 to perform a reset, to no use. Tried holding the reset button with the power off, and turned it on while keeping the reset button held, the router still reboots.

This is really unfortunate that upon keeping up with the latest upgrade as suggested by Netgear, you end up with a bricked router that cost over 350$. I called the support, they told me that I have to buy a service agreement (130$ for a year or 90$ for 6 months)  which will be refunded if they can't fix the issue (that's reassuring!).

I've ordered the usb to ttl cable which will be delivered in a few days and then I'll attempt the tftp via the usb serial cable. Though that process doesn't seem risk free.

Does anyone have any suggestions other than what I've already tried or what I plan on doing?