They support /31s and have for some time.   The trick we found is that the Mikrotik has to be the higher numbered IP and network address has to be the lower

add address=x.x.x.61/31 interface=ether1-<ISPNAME>-dia network=x.x.x.60

Then point your default route at the lower numbered IP in the /31.

-richey

From: NANOG <nanog-bounces+richey.goldberg=gmail.com@nanog.org> on behalf of Bryan Holloway <bryan@shout.net>
Date: Tuesday, February 13, 2024 at 11:05 AM
To: NANOG list <nanog@nanog.org>
Subject: Re: The Reg does 240/4

Let me know when they support /31s.


On 2/13/24 08:07, Dave Taht wrote:
> And routerOS is one of
> the more up to date platforms.