Uncluster SQL

Hi,

We have recently decided to uncluster our 2-node active/passive SQL cluster with the intention of then virtualising the remaining single node.

After some research it seems I have 2 options:

1. Convert two node SQL cluster to standalone instance of SQL
2. Retire one node of cluster or convert two node SQL cluster to single node SQL cluster

What exactly is the difference here?

Surely option 2 is the easier, so what benefit is there of actually performing option 1 instead.

It I simply evict the passive node, I can still operate as a 1-node cluster...in this case, can I then simply virtualise the disks on the active node (including the quorum, SAN attached disks).