Yes, yes, Windows 10 Mobile had this in 2017, yes, yes, iOS and Mac users have had this for almost as long, but hey, let's be happy that Windows and Android users (with SwiftKey, at least) can now do much the same.
Generic Android users will find SwiftKey in the Play Store here. While devices like the Surface Duo/Duo 2 will have SwiftKey pre-installed. In each case, you'll have to sign into your Microsoft account again on the phone, within the SwiftKey application.
From the SwiftKey site:
1 - How to enable Cloud Clipboard
On SwiftKey Android
- Open your Microsoft SwiftKey app.
- Tap on Rich input > Clipboard.
- Tap the ‘Sync clipboard history to the cloud’ toggle.
On your Windows 10 PC
- Go to Settings > System > Clipboard.
- Tap the ‘Clipboard history’ toggle to on.
- Tap the ‘Sync across devices’ toggle to on.
2 - How to manage your Cloud Clipboard
Your Cloud Clipboard will only ever retain your last copied clip. Your clip will be available for an hour.
By default, your last copied cloud clip will be shown on your prediction bar as a quick paste option. You can find the setting to turn this off by opening your Microsoft SwiftKey app and tapping on Rich input > Clipboard > Show last copied clip as quick paste option in prediction bar.
When this is off, your last copied clip from another device will instead only be viewable in your clipboard history.
All good stuff, even if it's 'opt in' and even if the feature is somewhat late to the party. Interestingly, you can also use this facility to sync clipboard data between different (signed in) Android phones.
- Cloud Clipboard can only be used with a Microsoft Account (Live.com, Outlook.com or Hotmail.com) - you will not be able to use your Microsoft work email account, Google, or other email addresses.
- SwiftKey for iOS isn't supported (yet).