Personal experience on Thursday in NBO-arrived around 9pm late from Kigali. Arrivals processes still completed in tents on the Tarmac but efficiently. (Watch that there are not more lines than tellers so that you don't end up in a herd vying for attention.)

There were not any working ATMs in arrivals but several banks for forex.

Departure on Saturday was easy. One escalator out of service but otherwise no issues or sign of problems on that side. (Other than a chapel tent near departure drop off)

I stayed at the crowne plaza on points before visiting a friend out of town in Kijabe. Used a wonderful taxi company for the 1-2hr trip each way as well as 3am airport pickup our last morning. Each of the 4 drivers we arranged was early, good driver, good seatbelts and vehicles. Happy to give company name/contact if anyone needs.