What happened when you stopped lifting weights?

I got fat. (The pregnancy may have helped with that. )

Not a huge/rapid change, for me. Moderate strength loss, not much appearance impact that I can see. But I'm possibly a little bit weird case.

My regular "cardio" obsession (rowing, on-water and machine), is on the strength-y-er side. (A solid hour of on-water rowing is about 1200 reps of lower-body push and upper-body pull (with added mechanical advantage via leverage) of my body weight and my share of the boat/equipment weight, horizontally, against the friction of the water. It's not a huge amount of resistance, and it's only in one direction, but man, that's a lot of volume. Even with water breaks and a lower SPM during turns and such, an hour is still 900-ish reps or so, and I do it 4 days a week in season. And we carry the boats, overhead or on shoulders, to and from the water.

If/when I can talk myself into strength training - because I'm hedonistic and don't enjoy it, even though I know it's best to do it - I usually do it in my off-season from on-water rowing. If I manage to get myself in gear two years in a row, I usually have something up to a month-ish of make-up time to get back approximately where I was when I left off before the 4-5 month or so gap. (I do intentionally ramp up slowly because I'm a li'l ol' lady with some parts that have "issues", so I'm always very cautious about progression (but do work toward it)).

I don't follow a respected strength program. (Reasons are complicated, because I believe a sound program, is a better idea in general, and advise others accordingly). I don't stop using many/most of my muscles, fairly intensively, when I stop lifting. My bodyweight doesn't much change (since 2015). It's been literally years (decade?) since I did all-year-round strength training with any kind of reasonable program, and even then, I only did it consistently for a couple of years.

So: When I strength train, I do things (knowingly) that limit my strength/mass gains. When I don't strength train, I don't stop providing some consistent though lesser level of muscle stimulation.

If I don't strength train, it usually affects my mood neutrally or positively (I don't like to strength train, like I said). However, if I don't work out for days/weeks, I get moody and mildly depressive, and hold stress in my body (so more discomfort from arthritis and stuff). If I don't row, when the weather permits, I get very, very cranky, because . . . rowing !

I know that was too long and wordy, but I thought maybe a perspective from a non-fan would provide some contrast.

People ought to strength train. Including me.