[tor-relays] could Tor devs provide an update on DOS attacks?

[starlight.2017q4 at binnacle.cx]

At 07:36 12/31/2017 -0500, I wrote:
>
>. . . suggest adding support for circuit-extend rate-limiting of some kind or another. . .

also:

Heartbeat: Tor's uptime is 10 days 0:00 hours, with 115583 circuits open.
I've sent 5190.11 GB and received 5048.62 GB.
Circuit handshake stats since last time: 538253/637284 TAP,
5878399/5922888 NTor.

Heartbeat: Tor's uptime is 10 days 6:00 hours, with 179761 circuits open.
I've sent 5314.34 GB and received 5193.56 GB.
Circuit handshake stats since last time: 34639/34885 TAP,
*** 18741983/144697651 NTor. ***