The Remington 7mm Magnum was my first bolt action centerfire. Chambered in a 700 Classic I chose it because I believed it would be the only rifle I ever needed for Big Game hunting in North America. To a 19-year-old college student with very limited resources it's combination of speed and power and great marketing efforts by Remington convinced me this was the only rifle I would ever need.
As I approach 60, and having taken deer, and elk in North America and several African species with this rifle I still believe it could fit the one rifle motif.
I took this rifle to RSA for my first safari for purely sentimental reasons. I killed 8 plains game animals with 9 Barnes TSX 160 gr bullets at 3000 fps. An Impala, Blue Wildebeast, Warthog, Kudu, Sable, Waterbuck, and Zebra took one each. Only the Gemsbok required a second. The first shot hit the left humerus and did not break the bone but deflected caudoventrally (down and to the rear). I would never have believed that such a deflection could occur had I not seen it myself.
I have long ago lost track of how many rifles I have owned. I now look at rifles as specialized tools and have a multitude, each filling a unique niche. I have rifles that are faster, bigger, smaller, more modern, more attractive, and some much more expensive.
I no longer would choose this as my one and only rifle. That would be my 9.3 x 62, or .338 Win Mag but it has never let me down and I will never be without it.
I guess you never get over your first true love.