The April and June updates on the TA-1020 will probably arrive when the Android 8.1 update arrives as well, so that will be when h*** freezes over then!!!!
@Sammy Well my Nokia 8 has received Oreo and the latest security patch but my mums Nokia 3 is still waiting for Oreo and the security patch here in the UK. One thing to remember is that the Nokia 3 uses a Mediatek processor which makes updates more difficult compared to phones using Qualcomm processors, it will get here eventually but it's just going to be a long wait for it I'm afraid :-/
@Sammy Exactly but it could be any number of reasons that Mediatek processors are hard to develop for, lack of documentation and lack of drivers are just two of them. All I know is that those manufacturers will probably run into issues providing updates for those devices.
@Sammy Yes but Project Treble isn't processor dependent and, AFAIK, requires the phones to have storage partitioned in a specific way which can't be done OTA.