The Monero community are not thrilled about this, but for an average XMR holder It's a great move.
xmrscott, Monero contributor, here. For the average XMR user it is actually a bad move as it undermines their privacy. It also undermines XMV privacy arguably more so as XMV users will have fewer tx's. For more details see the video samsunggalaxyplayer put up:
https://www.youtube.com/watch?v=TlVsMTeT_nEThe official website also explains this somewhat in a recent blog post:
https://getmonero.org/2018/02/11/PoW-change-and-key-reuse.htmland the Monero Stack Exchange:
https://monero.stackexchange.com/questions/7608/what-is-monerov-and-how-is-it-different-than-moneroLong story short, if you choose to use XMV from the chain split as a result of XMR you held prior to the split as well as the XMR, you are effectively attacking the privacy of yourself (people can tell which input belongs to you 100% on both chains) and attacking the privacy of others who use your 100% known tx in their ring signature. If you value your own privacy and do not want to be malicious to others then do not use XMV unless they decide to create a blockchain from scratch instead of doing a chain split.