Every person matures at a different rate. I was sexually active at 16. I don't regret it. I was ready for it and I learned a lot. I made sure I was with the right man the first time I had sex (and with any other man I had sex with) and have never regretted a sexual encounter.
I don't think it's any different "now" than it was years ago. Teens have been having sex since the beginning of time. My mother and father had many friends who got pregnant in the late 50s and early 60s, when they were teens. We are pretty sure my grandmother was an unwed teen mom in the 1920s! (My dad's older sister, by more than a dozen years.) In fact, the teen pregnancy rate has dropped recently.
I do think some people feel pressured to have sex early. A few teens may have a hard time saying no to a prospective boyfriend or girlfriend. That is nothing new.
But, many of us are happy with our youthful decisions and glad we did what we did when we did them.