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There is no out of order seek penalty for SSD drives like traditional hard drives. In fact you cannot guarantee what the SSD does to your logical blocks underneath the hood (they are mapped in indirect tables). You do not want to do defrag an SSD due to adding necessary erase cycles, that is why Windows has it disabled.

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That's only partly true, fragmentation can and does massively effect SSD performance both on read and write, can effect write latency, but not read latency.

(think of it in terms of an SSD being a huge pile of 4MB blocks where each block needs to be completely erased to clear out old content to get a clearer picture)

From what I understand, the blocks are just "marked" as being deleted, the TRIM command erases/wipes the content. Windows does this [TRIM], in default setup, once a month.

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