There's 3 things that really stand out for me that I would say made a massive difference to my life:
Cordless screw driver. Bought the day after building a flat pack bed with a crappy screw.driver that just shredded my hand. Thought it was frivolous at the time, but I've used it so much since. It's light, small enough to fit in my pocket and good for 90% of DIY tasks.
Tassimo coffee machine. Bought it 9 years ago, use it every day. Nice quick easy coffee. What's not to like.
My first DSLR camera. It was a Nikon D50 back in 2005/6 and it sparked my interest in photography to this day. It gave me a hobby I can take lots of places and do it alone or with others.
I never loved the D50 camera itself, but I did get some really nice shots with it
Steam Deck, handheld gaming computer, barely use PS5 anymore, this one is so quick and convenient to just pause and resume games and take gaming everywhere and the SteamOS Linux is awesome. I use the desktop mode with full KDE Plasma desktop as my portable computer a lot when on the go. Also with the dock station I can use it as a gaming console when going on holidays.
And the flat I live in. Good thing as I bought it quite a few years ago since the home prices are just criminal and highly unjust now. This stuff does not belong on markets to be sold for profits or some criminal short-time renting crap like AirBnB
As a fellow PS5 owner, and someone who would like to game on the go, the Steam deck interests me, especially as Sony refuses to release a proper handheld, but I'm finding it hard to pull the trigger on it, as the majority of my game catalogue is on PS5, and what games I have on PC are mostly not on steam platform. I have some games that are on steam that could be played on the go, but what is the Internet connectivity requirement like?
You can play non-steam PC games on it. It's just a little less straightforward. You don't need to be connected to he Internet to play most games. Some might require you to be connected when you launch it (I think RDR2 did that), but then you can just keep it running and put the steam deck to sleep.
And the flat I live in... This stuff does not belong on markets to be sold for profits
But markets are why you were able to buy it.
Here in Sweden they do rent control with the first hand contracts system and it just leads to extreme corruption. So a few lucky people pay ~400 EUR a month in the city centre, meanwhile normally you'd pay 1800. They sub-let them illegally, and anyone moving in from outside the city (no 10 years on the city housing queue) faces an extortionate, unregulated black market.
Markets are the solution, not the problem. We just need freedom in construction too, so supply can match demand.