What is the purpose of Solo?
To make Walt Disney a lot of money...unfortunately....
Sorry, had to do it.
In my humble opinion, Solo is a way for players to enjoy the game without having to put up with the grief that can and does happen in Open.
While admittedly, not everyone in Open is a Harry Potter waiting to pounce from behind an asteroid,nor do they act that way, they all "have to option" to emulate his antics... Hence the open play, which is basically the Wild West with a bit (okay A Lot) of Mad Max thrown in. Also, as there are no real "Rules of Engagement" in open (or Solo for the matter concerning NPC's) it is as it should be. You fly at your own discretion and if you get bounced, then you "Knew the job was dangerous when you took it".
Personally, I would probably quit if I had just finished a long exploration journey with hundreds if not thousands of systems worth of data in my computer only to have it wiped out because someone wanted to get their jollies by destroying me. If I didn't quit, I would do some serious heavy thinking about continuing the game. Without a Solo Play option, I could see many rage quitting after something like that happening. People don't like it when their hard worked for accomplishments are wiped out without a thought to how much effort was put into it. While I don't know that anyone did quit, take the recent DW2 trip, that had gankers hidden in the group who decided to do a mass attack on ships as they were getting ready to jump. I believe I had read that some went to Frontier to have their accounts "reset" back to before the ambush. I would have tried at least...
I have not played in open, and most likely, won't. But that is my choice, and we all have choices, so go out and enjoy the game as you see fit. But if Solo did not exist, I would not be enjoying this game and the wonders that have been created in it.
Take Care and Check Six Commanders o7
Lakon Micheal Charlie Golf signing off...