USB B connector is still part of the USB standard, "filo" is correct. All USB revisions (including latest revision of USB standard, USB 3.2) include backward compatibility with USB 2.0, the general packet-based framework remains the same, and all legacy cable assemblies (which includes USB 2.0 Type-B connector) are fully specified.
The new revision of USB standard only splits the legacy cable drawings and definitions into a separate document (from USB 3.2 specs, Section 5 page 50):
The electro-mechanical definition and requirements for USB connectors
and cables have been removed from this specification and are now
located in the USB 3.1 Legacy Cable and Connector specification.
The exception is the set of mini connectors, mini-A. mini-B, and mini-AB receptacle, which was retired from USB 2.0 specifications, and superseded by flimsy micro-A-B set of connectors. So using mini-B won't lead to USB-IF certification logo, but the old-style USB 2.0 Type-B receptacle is still a valid design option.
CLARIFICATION: USB 3.2 Specifications state, Section 3, page 15
USB 3.2 is a dual-bus architecture that provides backward
compatibility with USB 2.0. One bus is a USB 2.0 bus (see Universal
Serial Bus Specification, Revision 2.0)
Formally it means that all USB 2.0 provisions, with all ECNs are still in effect, including all connector arrangements.
AMPLIFICATION: More formally, USB electro-mechanical connectivity nowadays is defined in the USB Type-C specifications. The Type-C specs define backward compatibility by specifying "legacy cable assemblies" like "USB 2.0 Standard-B to Type-C", which implies that there must be USB 2.0 Standard-B receptacles to work with. A USB device can be made with Standard USB 2 B receptacle, the only downside is that it can't claim "USB 3.x compatibility", it is a "USB 2.0 device", with all corresponding USB 2.0 certifications/implications.