My Linux computer uses a tiling-based window manager, and damn, I could never go back. The workspaces concept they use is infinitely superior to alt-tab.
Windows has virtual desktops with Win + Alt + Tab to show the options and then you can switch with Win + Alt + Left/Right arrow. Also you can tile your apps in every corner/side you want or size? I use a 43" Dell 4k monitor and it even comes with software (Dell Display Manager) to manage all these options.
Microsoft has revived the good old PowerToys as well. It now includes a FancyZones utility that allows to define zones that windows can automatically snap into while dragging them (while holding a key). It also has a setting to overwrite the Win+Arrow key functionality to move windows between these "fancy zones" instead.
Well it's better than alt-tab, but if it relies on arrow keys, it's not ideal. Being able to go directly to any workspace with a dedicated key combo is the best option.
