with the native slider yeah - with other sliders you can have dynamic width/heights. SplideJS, SwiperJS
Are there any down sides to using Splide or Swiper?
Can they cause the page to load slower? Or break more easily?
I suppose anytime you add any additional scripts it could make the site load slower sure, but other than that - nope - just the extra layer of complexity is the only major downside really.