Back in the day you could destroy a weapons platform. But, they'd come back in just a few seconds (as long as there was supplies?)
Although I get the difficulty presented, we just can't go without them. (for the record, I don't have a base)
However, I would be all for going back to being able to take them out, and have them stay down for a good 2mins. That would make it so that during a siege, tactics could be employed by the attackers to work their way in closer to the base targeted. Only thing is, during a real base siege, big capitals can come back after 2 hours from being eliminated, and that leaves the base far more disadvantaged than the attacking side, always (in real organized attacks). If its an organized attack, most bases, regardless of weapons platforms, fold quickly,without help from defending ships. If anything I see it usually being too easy for the attackers (until recently with indestructible wep platforms), even with how it is, since like I said, attackers can return in a couple of hours on the same vessel to resume siege, yet the base must continuously endure, when if a big ship was taken out during an assault, they'd be eliminated for far longer than 2 hours.
Otherwise, having made them invincible seems to be too far in the other direction.
As a lone pirate, I had to learn how to try to blockade a base, keep the fleeing ship from docking, while avoiding weapons platforms on top of that. If you're meticulous, you can just draw the weapons fire into the camped vessel. If its in an asteroid field or debris field, using the debris to protect yourself as you go is an option. I did that to a guy once that told me he was just going to 'xbox' while sitting there on top of the base letting the platforms keep me at bay. He didn't pay attention for a while, and eventually saw I had taken his hull down almost by half using his own weapons platforms, angling my ship so he was in the middle of me and the weapons platforms. Thats what you get for thinking you can just xbox while sitting pretty. norp definitely deserves some harsh methods.
But without the option at all, so many bases would just disappear. There has to be a deterrent. Maybe less platforms, and up the damage caused by the actual base mounted turrets(?), which would mean the deadliness only ramps up at very close range, and platforms could still be set for the event of organized attack.