I've just upgraded to EE 2.7.0 and I am thinking about migrating my use of Matrix to Grid and my use of Playa to Relationships. The main reason is that since I run more than one site off my EE install, using Grid and Relations would allow me to implement such fields on all sites, instead of just one since I only have a single license each for Matrix and Playa.
Moving manually would be a bit time consuming, especially when it comes to my Matrix implementation, so I am wondering if anyone has any suggestions for how to automate the process? I do own Solspace's Importer module, but I am not sure if it would be useable in this scenario.