Not currently, no. The PLAY:1 has not yet been offered as a device to be ‘recycled’ or ‘upgraded’. 

Why do you want to upgrade?  If for voice control then an alternative is Echo Dots or Google Minis.  Otherwise, although I would not advocate buying Play:1s now (e.g. off eBay), I’m not sure there is a great gain from upgrading at this point. Who knows what the options may be in 3 years from now, say?  Interested to hear what others think.

Incidentally, the latest speaker is the Sonos One (and One SL).  There is no Play One.

Everyone is correct - there is really no reason right now to upgrade from Play:1 to Sonos SL (really same speaker at this point).   Sonos One adds voice control - but you would be better off at that point just buying a google mini or dot like John mentions.