Why is Add-WindowsCapability so slow for RSAT?

[jespinoza_vt]

We install RSAT for our technicians by using:

 Get-WindowsCapability -Name RSAT* -Online | Add-WindowsCapability -Online​ 

The download/install is incredibly slow, averaging about ~15 minutes per RSAT tool. There's a total of 21 RSAT tools to install so do the math. 

• No network/traffic blocks. This works just as slow on an open home internet network.
• No difference between a one-liner approach or foreach logic
• WUServer is 0 in HKLM path of the registry
• CBS.log shows about ~10 minutes of Download Progress 49/100 (always at the 49/100 mark)
• DISM.log doesn't show anything useful

  Quick googling shows a lot of other people experience slowness. If we can't rely on Windows Update CDN, what's the alternative? 

  
  Separately downloading, extracting, and storing the content on a network share is cumbersome for each time a new build/FU comes out.

[#2]

Same here... took almost 7h to install all RSAT Tools 😞

[#3]

Can confirm this is beyond ridiculous. About 36 MBs for what I was downloading taking literal hours

[#4]

@jespinoza_vt    I'm on day 3 of waiting for the RSAT tools to download and install.  Only 9 left to go.  Maybe finish this week?

[#5]

Same problem here. Taking FOREVER!

[#6]

Adding my frustration to the mix. We have the exact same problem, RSAT installation is horribly slow. This issue was not present on Windows 10.

[#7]

Any updates on this its very frustrating. Is there an offline install as an option?

[#8]

My install did finish that day.  It was basically 2.5 days from starting the install until it finished.  This was on a virtual machine, so ended up using that copy of the vm as a gold image, since didn't want to have to go through that again for the number of virtual machines that need it too.

[#9]

Same issue here, taking an eternity to down 300k.

Dear Microsoft, we'd like to get to work now.

[#10]

Same here. Nice and quick with Windows 10. Windows 11 takes HOURS.