It was my understanding as well that Tankbreaker was what the v1 creators called what would become the Javelin ATGM IRL. As a Ref, at least, they are one-in-the-same in my T2kU.
IRL, recent reports suggest that a Javelin ATGM achieved its first aerial kill- a Kamov K-52- in Ukraine. The source of the reports is Ukrainian and, AFAIK, there's been no independent confirmation, but the Javelin was designed with that capability in mind. Other ATGM systems have achieved confirmed aerial kills v. helicopters (a TOW II downed a Gazelle in Syria, and a Stugna-P killed a KA-52 in Ukraine).
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One thing I really liked about T2k as a kid were the speculative weapon systems, especially vehicles. The writers got more wrong (LAV-75, Diana SPAAG, turretless M1A2) than they got right, but it was fun to think about what weapon systems lay just over the temporal horizon. I understand why 4e didn't include any speculative systems (unlike the v1 creators, they didn't have to project forward), but it was a little disappointing to not see any "legacy" or new speculative systems. I would have appreciated it if they'd included something like the LAV-75 as fan service.
If this topic is of particular interest to you, the linked thread focuses on small arms programs that may or may not have gotten off the ground prior to/during the Twilight War:
https://forum.juhlin.com/showthread....pons+timelines
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