as i understand it, wasapi is also a 'layer" that utilises the WDM driver for a device, much like ASIO4ALL, so I was wondering if anyone has compared the two yet? (i saw some comparisons against "real" asio drivers, but not asio4all, which to me is more in that same ballpark than a well-written asio driver, as it also addresses the wdm driver...)
 
so... is it time to say good bye to that old friend, asio4all?
 
thoughts?

For me is ASIO4ALL still working fine, better than as the original NI driver for my komplete audio 6 interface.
WASAPI doesn't work in my system. Therefore no "good bye" to asio4all.

WASAPI is really only for onboard audio devices like Realtek chipsets, as I understand it.  Also, it only improves performance on Win 10 systems.

Its for any audio device that supports it. Not all do. 

That would be an interesting test. I just might try that once I get this new computer up to speed. I'm fighting with MS on upgrading it to Windows 10. The down loader stalls at 99%. I started on Sunday night. 4 tries so far but I now downloaded the ISO image and will try that tonight. 
 
Once I get that sorted I will be switching my main DAW to this machine as it is seemingly  more powerful ( i7 3.5)  I could then sacrifice my old DAW machine and install asio4all out of curiosity and run a few tests to see which performs better. I would not be tempted to install asio4all on any DAW I cared about. 
 

I've been having a play with using my laptop and SPlat in Wasabi Exclusive mode and it seem fine with latency of 3ms. My normal interface is a Focusrite Scarlett 6i6 which I don't carry with me unless I'm doing serious location recording. But the former seems a big step in the right direction. I just wish that Focusrite would update their first generation drivers for the 6i6. I feel that they are dragging their heels so everyone updates to the new 2nd gen interfaces.

Going back a few years I was using a Cakewalk (actually Presonus until Roland bought Presonus) UA-101 interface with X1 and Windows Vista.

There were a couple of bugs in X1 at the time which went away when I tried switching from ASIO to WASAPI. The Roland WASAPI driver gave very similar latency and system load results as the Roland ASIO driver.

I would be very surprised if asio4all came anywhere near wasapi under Windows 10 for latency. Microsoft have made many Improvements to wasapi.

I am getting about the same latency (playback and VSTi only) on my laptop with ASIO4ALL and the Realtek audio chip, as my DAW workstation sees running ASIO over a FireWire audio interface.
 
It will be interesting to test the new, improved WASAPI drivers on the laptop.  The laptop is not something I particularly care about, it's just a portable office that I loaded it up with the audio toys to play with away from home

WASAPI works great on my machine, but for Live 8 I still need ASIO4ALL.