Speaking personally, if the Sidewinder is a lot of fun, and I feel like I've mastered the Viper, why not? In a skill based game, I want to develop my skills, as opposed to relying on equipment I've spent an eternity grinding to acquire.
Again speaking personally, I think a game should be fun, and I play them to make interesting decisions. Eternal power-creep is antithetical towards
keeping decisions interesting. It's why I tend to bump up the difficulty of single-player games to the point where I'm failing regularly. Frontier failing to
keep the day to day decisions I'd make interesting via increasing income, as opposed to rightly addressing their exponential cost curves, is one of my the greatest sources of disappointment in this game.
I usually play Iron Man mode in single player games, because the
early game is usually far more fun than the so-called "endgame," thanks to power-creep being an issue in the endgame. Who cares about retaining meaningless stuff when the game is no longer fun anymore? Especially when it comes to survival game, where the fun is seeing how far I can get before getting killed, rather than building massive structures due to not having anything better to do with my massive amount resources.
Heck, I roll on
this site every time I get destroyed, just to keep the stakes high enough to be interesting. The only caveat is that if I'm in Open Mode, I won't reset my commander upon permanent death. I have no issue losing a ship (especially these days, when the most valuable items, effort wise, are the engineering done on my modules) to a player-killer. But I won't do perma-death in an environment where that player-killer isn't playing by the same rules.
Plus Frontier kind of trashed the early game by increasing income, rather than reducing their exponential cost curves.
Once again speaking personally, this game was at its
best when credits were scarce enough to make the decision on
what to spend those credits on meaningful. Do I invest them into a larger ship, premium modules, or to progress my BGS goals? Do I take
this mission to progress my BGS goals, or
that mission for the credits? Do I fly
this ship to keep operating costs down and rely on my skills, or
that ship with higher operating costs, but require less skill to accomplish the same goal?