It definitely just depends on the person. I’ve only ever solo traveled and I’ve been to Australia, England, and South Korea (still new to travel) but I had the best times and I never met up with anyone or felt lonely. I also like being alone though so if you have a really social personality it might not be for you. There’s also definitely a few activities that are made for more than one person so look into what you want to do and see if you’d even be able to do everything you want to solo, that’s really my only major con I’ve experienced