What we want: In desktop mode, right-clicking will be changed to a grab action. This will align with other platforms and eliminate the need for platform-specific hacks to set auto-hold.
Alternatively, left-clicking could be changed to force a hold, like on smartphones.
With VRCPickup 1.1
VR
Auto Hold on -> Grab toggles (grab again to drop), and PickupUse is enabled by triggering while holding.
Auto Hold off -> Grab becomes hold-type, and PickupUse is enabled by triggering while holding.
Desktop
Auto Hold on -> Grab toggles (right-click to drop), and PickupUse is enabled by left-click while holding.
Auto Hold off -> Grab becomes hold-type (release left-click to drop), and PickupUse is disabled (because the left-click is held down).
Smartphone
Forced hold regardless of Auto Hold, and both Drop and PickupUse buttons appear while holding.
This shows.
To use PickupUse in desktop mode, Auto Hold must be turned on, but in VR mode, Auto Hold should generally be turned off.