I have a few Google home mini's and an Alexa. All have deteriorated since I bought them, becoming worse at both what they offer, and how well they understand or do what they still can.
My first google mini I could ask for a recipe and it would read one out. Next step to move along, it was cool but slow. I got one with a screen which was pretty good as you could see the steps and jump ahead more. Then it 'upgraded' and the recipes were just web pages now. It doesn't read it any more, it's worse at finding them, half the time it'll try and play a music video instead.
Alexa's the same - you've a good 20% chance at any moment of it figuring you want to listen to music about whatever you just asked. I never want them to play music, but there they go playing loud enough you have to yell to shut it up.
Lights were great at the start. I have a long room with lights nowhere near the bed. Google turning the lights on and off was amazing. Dimming the lights even better. But after 'improvements' it never seems to know fully about lights. The same spoken word might get the lights off. Or might turn every light in the house off. Maybe it will say there are no lights. Or say that, then turn the lights off anyway. Why did it work so well years ago, but now they never know what you mean?
They don't seem to distinguish like they should either. My mum has several Alexa's(visually impaired it's a great tool for her) but she complains they don't listen anymore as well. Used to be the one in the room you were in would answer. Now it might answer in the adjacent room, and control lights in there leaving you in the dark. Even worse with google, as your phone also listens then takes over to tell you it doesn't know what room your in so which lights do you mean?
And even my mum has noticed the increasingly bad question responses. She used to ask Alexas questions all the time, but now she says it's either confused or wrong.
I don't know if this is all because they cut back on the abilities to reduce the money pit these things became, or if the newer Gemini style assistants are just worse at giving practical help, even if they're more natural sounding while being useless.
But it's annoying as hell seeing something that was a pretty good system get worse and worse over time, losing the skills to do what it did.
Maybe Alexa+ will change that, but I'd put more money on it continuing to play random music in rooms you're not in and make up weird answers to questions rather than just do some basic but actually useful tasks.