Not retired, but worth noting that assets have doubled last 10 years, and tripled last 15 years (since 2008). Had I retired in those timeframes I am quite certain my response would be "significantly up" given that most of the aforementioned increase has been from asset appreciation rather than savings. Not that I haven't been saving, but I'm past an inflection point - growth is significantly larger than savings.
Most of the friends I have that retired over this timeframe have found themselves to be in the position of increased wealth, though probably not as dramatically as I described (because real estate has accounted for much of my out-sized growth). Last 10-15 years definitely looks like ideal timing to have retired, especially given the low inflation environment would have enjoyed.
But, in no way do I take that to be an indicator of the next 10-15 years.