Polygon(MATIC) emerges as Layer 2 of choice for most Ethereump dApps
Polygon, the layer 2 scaling solution on Ethereum, has hands down emerged as the solution of choice of all the dApps, big and small, that rest on Ethereum right now but are looking for alternates to migrate to.

Already, major protocols like Aave and Sushiswap have migrated to Polygon and the latest to join the bandwagon is Uniswap which is also looking to migrate to Polygon. This represents a big shot in the arm for the network as all these are major protocols that have been doing very well on Ethereum but of late, have been hit by the high transaction fees and slow speeds, and congestion on the Ethereum network.
Easy Decision for Developers
For these protocols, it would have been a pretty easy decision as Polygon ticks all the boxes that they need and that are currently the issues with Ethereum. It offers low fees and high speeds while at the same time, it uses the same backbone as the Ethereum network which guarantees reliability.
Many such Layer 2 solutions are available on Ethereum but so far, Polygon seems to be the only one that has addressed all the issues and provide itself to be a reliable partner for those who want to build on the network. It did have its initial snags but it seems to have overcome that one by one over the last few months and it now stands as the layer 2 solution of choice for anyone who is looking to exit the ethereum network in search of better alternatives.
Mysterium on Polygon
Apart from these major projects, the Mysterium project has also launched on the Polygon network and has seen some pretty strong adoption over the last few weeks, all of which benefit the Polygon ecosystem. The network has been attracting a lot of new and existing developers from Ethereum and since most of the blockchain developers have a background with development on Ethereum, it makes the job of attracting such developers into the network much easier as compared to the other networks which depend on a different native language and infrastructure and hence the learning curve is much steeper in such cases. The network has many things favoring it and so it all depends on how it manages the expectations of the various stakeholders for it to be able to grow vigorously.