If people are here to receive recommendations, I'm preaching to the choir. But responding the question directly, a computer of my own. Being able to go online or work on digital stuff whenever I want to has changed my life for the better.
A bunch of stacking prep bowls for the kitchen. Previously, I had nesting sets of glass and metal bowls, each with three sizes. I still kept the glass set for microwaving, but I gave away the set of three metal bowls. In their place, I got 8 medium bowls and 12 mixing bowls. They are great when prepping ingredients for mise en place style cooking. The mixing bowls are a bit larger, so I also use them for making salads, soaking chickpeas, and so on. It's nice to never need to scramble for bowls, but at the same time they stack perfectly so they don't take up much space. I bought extra because I am assuming the bowls with get damaged over time, but the company will eventually stop making them.
Tech to make day to day chores easier have had the largest impact for us. The automated self cleaning liter box for the cats, the cordless vacuum, the cordless electric mop (such as Tineco), electric lawn mowers (no maintenance), smart outlets and automations via home assistant.
Another big one is the RO water filter at the kitchen sink. No more bottled water. Bonus points if you get one that tells you when fillters need to be changed. So nice.
I live in Finland and so the seasonal daylight varies from almost none in winter to always in summer. I got a smart socket connected to my grow lamps for all my plants. I used to have an analogue timer that I would have to keep changing the times on as the season progressed. The smart one now turns on when my alarm goes off in the morning and turns off an hour after sunrise, turns on again an hour before sunset and turns off at bedtime.
No messing about anymore, it's one less thing to worry about.
That’s great! I also use smart plugs for grow lamps! So convenient. The home country of the creator of Linux. Lucky! :)
Kitchen stuff: a carbon steel wok, a Dutch oven and a bread form. Also an electric toothbrush.
But most of all: a fully automatic bean to cup coffee machine
Gymnastic rings, straps (includes anchor kit), and I paid people to set it up. Probably the best money I've ever spent.
Aeron chair. Got it to use at work, used to get a tired back and now I don't. Have had it at least 20 years and no desire to get anything else.
In the same vein, a Kinesis Advantage keyboard. I bought my first one fifteen years ago and now have two more. As a software developer, I do a lot of typing. It took some time to get used to the unusual form, but it was worth it.