U.k Cat owners, are your cats indoor, outdoor or combination?

my cats are inside unless I'm able to be in the garden with them to supervise. they're not even 4 yet and have already outlived every single outdoor cat my family had when I was a kid. we had four cats, all approved by shelter home visits, yet they were all killed outside by cars, or simply disappeared. being inside means I've put a ton of extra work into enrichment, so they've also ended up being the happiest cats I've ever had. they've also both been diagnosed with health issues which would have been complicated by being outdoor cats - one has heart disease which makes undergoing anaesthetic substantially more dangerous (even minor injuries could be lethal if surgery was required), and the other has a GI condition that may have been fatal had I not noticed a change in her toileting habits (if she'd only eliminated outside, I may not have known she was constipated until she had developed advanced megacolon, for example). outdoor cats are very much the norm in my rural-ish area. the most recent pet census revealed 3 in 10 cats are indoor in the UK, which is up from 1 in 10 a decade previously. I think cats do benefit from responsible, structured, supervised outside time. they're predators and need to be able to connect to nature. they are also a domesticated species and have lost the ability to reliably care for themselves outside, which means we need to do this for them. the world has changed **drastically** since cats were domesticated. the world cats adapted to survive in on their own no longer exists. we don't let any other companion animal free roam and I think the reason we let cats roam is because it's easier for us as their guardians to let them meet their own needs than it is to fulfill our obligations as pet guardians and make sure our cats' enrichment needs are met. it is generally much easier to neglect a cat's emotional needs than a dog's, for example. outdoor cat people are correct to say it is cruel for a cat to be understimulated and shut in with nothing to do all day. but this should not be the alternative to outdoor cats - indoor cats should be provided with species appropriate enrichment and stimulation and the sad reality is that most aren't. but sending a cat outside to too many risks to count because we can't be bothered to provide adequate enrichment also isn't quality pet care either.