Which TP-Link Archer C7 v5 are NOT supported?

I know https://openwrt.org/toh/hwdata/tp-link/tp-link_archer_c7_v5, but I read so much about problems with TP-Link Archer C7 v5 and people who bricked it. Somewhere I read that TP-Link is stopping 3rd-party firmware by modifying the hardware. Maybe I read, that C7 v5 has changes after a certain serial no. or similar.

I think about buying the EU-version as a black friday deal. But when it is here, I would like to check, if there is a chance to flash (and not to brick) this C7.

The EU version works fine. Just flash openwrt via the TFTP method and you will be happy.

Thanks, could you please help at Flashing a TP-Link Archer C7 V5.0 in detail I have some detail questions.