For me, photography gear management has been a constant battle between opportunity and minimalism, and personally, minimalism has won out.
Camera
Nikon Z6 - a simple mirrorless full-frame camera. I have many problems working with it, but I can't argue with its price.
Olympus TG-6 - a compact point-and-shoot camera that I primarily bought for underwater photography, but also comes in handy when I don't want to bring something big.
Lenses
Nikon 24-120mm f/4 S - my current workhorse, an enlarged standard zoom range with constant aperture.
Tamron 150-500mm f/5-6.7 - a cheaper telephoto lens with a large zoom range (something new I am trying out).
Nikon 40mm f/2 - pocketable and cheap prime with an interesting focal length.
Accessories
Zoom H1n - for recording audio, used along with a windscreen cover and shock mount.
Cleaning kit - cloth, brush, spray, sensor swabs.
Spare batteries - one of the downsides to mirrorless cameras is that they have very poor battery lives.
Transportation
Shimoda Action x50 - I used to be obssessed with it, now all I do is complain about it, but I couldn't live without it.
Peak Design Capture Clip - placed on my bag's shoulder strap, it allows me to securely attach my camera there for hands-free hiking.
Peak Design Slide Strap - it holds your camera, clips on and off, simple.
Storage and editing
Macbook Pro - something with suitable power for photo and video editing, and with a bright and colourful screen.
Adobe Lightroom Classic - for organising and editing photos.
Davinci Resolve - free video editing software.
2TB External SSD Harddrive - the faster the better for working with files.