Alias clips, also known as linked clips, enable convenient editing of clips that repeat throughout a project. Edit any one clip and the changes are automatically applied to all the other linked clips, also known as instances. It’s easy to see how this would extremely useful when producing electronic music genres. (source)

What problem(s) would this feature resolve?
Bitwig clips are all independent from each other which means changes to one clip cannot affect the contents of others. This can be frustrating for example if you want a repeating bassline and need to ensure all of the clips continue to play the same part by editing the clip just once.
How does this feature fit in Bitwig as a product?
Bitwig’s highly modular concept allows for abstract methods of creating links between otherwise separate parts of the track. For example the Audio Receiver can capture audio from any device in the project and then process and play it. Likewise with the Note Receiver which can intercept and utilise MIDI. Linked clips fits within this concept and would make producing a range of genres much easier. For example techno and house music as well as songs rely on repeating riffs which would be much easier to work with if they could be linked to each other and remain consistent.
Is there already an alternative way to achieve this on Bitwig?
Clips can be looped which means dragging the clip out longer than its contents will result in repetitions of the clip for the duration to which you resize it. The problem is that if you need to have a break in the part by copy/pasting or slicing it, the clips will become disassociated from each other and so changes in one will not affect the other(s).
Could it be implemented using Bitwig components or APIs, without Bitwig team’s support?
There are ways of using MIDI loopback to trigger clips in the clip launcher and even scene changes. It’s relatively trivial to set it up but it’s not ideal as it requires a functioning and reliable virtual MIDI port. It would be a much more transparent and potentially more reliable solution if it were directly within Bitwig through clip linking.
Could it be provided by an STV or something else reasonably integrated with Bitwig?
I don’t believe so
Are there other products that offer this feature?
Clip linking is a feature that exists in several DAWs including Studio One, FL Studio and Nanostudio 2 (iOS). It can be enabled in Ableton Live through a Max for Live device.