Just one question: What did your friend do back then in "original Elite, X-Wing, Wing Commander, Frontier 2 etc etc"? Seriously, what did he do? Aren't all long-term games about repeating the same gameplay activities? Like every MMO out there? I can't count how many times I went through the exact same strikes/missions in Destiny or Division. How many times I repeated the same activities in Neverwinter. How much grinding I did in any given RPG, from Skyrim to Witcher. Elite is all about the experience of flying among the stars. There are countless mission types in it. It's about living a space life. If you're not amazed by the galaxy itself just being there at your fingertips then no amount of gameplay or missions or lore or goals will make you satisfied. You play and "live" in this game not to save the world or rescue the princess but to take it all in. The sights and sounds. The virtual future of humanity. To experience the physics, to blaze your own trail. To have fun with friends. Simply to enjoy the feeling of being out there.
That doesn't mean I wouldn't have new ideas about gameplay but really it's not about gameplay itself (this is a spaceship flying game after all) but new mechanics and goals. They wouldn't change the game completely. No amount of mission types would. I still don't get what people mean by "meaningful gameplay". I have more than 1050 hours in this game now and I'm not bored with it at all! What is it if not meaningful? I'm enjoying my ships, the galaxy, the activities, the CGs. I spend my time among the stars because I love it!
"He had done all the mission types, run 5hrs of exploration to get access to Farseer, shot up a RES and CZ with me for bigger payouts, driven on a planet, spaced Ubered, CG'ed, mined and done lots of trading while watching CrunchyRoll."
I think that's a lot of things to do! If you think about how much time it takes to get to know the game, how to equip ships, how to earn money, how to engage in all those activities, don't tell me it's not meaningful. Or not enough. If your general love of space is there then this should be enough in the long run. And it always gets more complex with every update. Seriously, I don't get you or your friend. If you're bored with the whole galaxy then it's not only the game's fault. There's only so much you can do in a given genre. In Halo I always shoot the same aliens. So what? Most games you finish in 8-10-20 hours. And then they're done. You're never done in Elite. But you can get bored with it just like with any other MMO game that has repeating mechanics. Why do you expect Elite to constantly offer something new indefinitely? There's no such game, and will never be. Your love of space and science and astronomy can provide you the urge to go beyond gameplay mechanics and enjoy the galaxy forever. If it's not there then this is just a game like all others. Don't blame it because you get bored sooner or later. There's nothing Frontier or anyone can do anything about it. Every game gets boring after a while.