Yes. It is still the only option to create feature service with a spatiotemporal data source without using GeoAnalytics or GeoEvent Server.
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Hi Leon / Jerry, Please try the answer provided in the this following thread and let me know if works for you - Portal 10.7.1 throws error with AddToDefinition endpoint in REST API.
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Calculate operation is not yet supported on Spatiotemporal Big Data Store feature service. Bulk loading data (upsert) would be possible in future release. -Gaurav
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