about your TPLINK,

there is often a "recovery feature", an alternate boot partition [ i posted about this some time ago.]

if you configure your router so that it "bricks" you can boot in the last working configuration before your changes; rescue; and save to overwrite the brick partition. presumably you can do this forever, as long as you dont brick both partitions.

3 interrupted boot cycles would cause a switch to last successful boot partition.

in my case i had problems because of the curious way we have power failures here. the power would brown out and each phase of generation would send a peak and trough, equivalent to turning power on then off before boot completion 3 times.

if you want to be snazzy, you can play on this and work two partitions at once each configured for different purpose, and accessed by briskly cycling power thrice.