Is the Trinity Desktop Environment Secure?

So, a while back I installed Xfce with Chicago95, but was disappointed. Xfce just doesn't vibe with me, and a strict emulation of Windows95 is not really what I wanted, I just wanted something that "felt" that classic.

So I was gonna give up and just use KDE, until I saw TDE. I think TDE is probably what I'm looking for but I'm concerned about using anything so minor because security.

It TDE secure (for personal use)?

Can a DE even be insecure, or are they all generally as secure as each-other as long as you follow the rules (trustworthy software, closed firewall, install patches fast, and disaster recovery plans)?

What vulnerabilities can a desktop environment even have (edit)?