I think with the surge in current ETF activity target date funds have lost a lot of their luster. They are primarily higher fees, and because their asset allocations are often rigid and set at particular dates, individual investors can't really be all that flexible.
For example, someone looking to scale down their equity risk could easily transition from an all in one fund like XEQT, which is 100% equity, to a fund like XGRO, which is 80% equity. They could then go down further to XBAL, which is 60% equity.
I guess what I am saying is the "glide path" offered by target date funds, which is the scaling down of risk and reduction of equity exposure, can be done very easily via a DIY style these days. A lot of these target date funds start slowing down allocations much earlier than most desire, which could end up in lower returns when you're still in a position to take on more risk to realize higher returns.
We don't really have a ton of target date funds here in Canada. They're not as popular of an asset and I do believe it's because we have a lot of solid all in one funds that allow investors to kind of create their own with a single click of a button.