Powerline ethernet adapters have always depended very heavily on how the power is laid out in your home (and things like "noise") They can't, for example, jump breakers well.
So YMMV, but in my experience they haven't improved much if at all, the only thing that could have changed is your placement, the noise on the lines or your home.
I'm comparing against three different generations (and brands).
A very early powerline adapter that was I think 100Mbit, back in around 2004-2006 I think - it basically didn't work at all, and I got rid of it.
In ~2017 a new set top box came with a pair, but much smaller and sleeker. They worked out of the box, but did need to be powered off and on every month or two.
These new ones, they plugged right in, they delivered 800-900Mbit through iperf3, and the wifi thing, once configured with the right SSID and Password, worked great, and have been stable for about 6 months now.
This is all in the same house, and no major rewiring or renovations have taken place, and using the same sockets. The new deployment included additional sockets in other rooms since it worked so well.
So YMMV, but in my experience they haven't improved much if at all, the only thing that could have changed is your placement, the noise on the lines or your home.