AR750 - where is 2.264 (stable)?

Why is the 2.264 firmware for the AR750 not available?

www.gl-inet.com/firmware/ar750/v1/

I only see 2.263. Compared to say:

www.gl-inet.com/firmware/ar300m/v1/

I do see something in the testing directory:

https://www.gl-inet.com/firmware/testing/

Is that safe to use?

 

Yes please use the testing firmware now. We are upgrading to 2.27 now.

What changes are there in 2.27?

You can see this.

https://www.gl-inet.com/firmware/testing/readme.txt