What is the maximum number of connections a normal Bluetooth device can handle at one time?

A limit of 2 connections describes a simple point-to-point link, not the maximum capacity defined by the Bluetooth piconet specification.

4 connections is below the Bluetooth piconet maximum and does not correspond to any formally defined Bluetooth protocol limit.

A single connection would describe only a one-to-one pairing and does not reflect the full multi-slave capacity a Bluetooth master device supports.

8 is the total device count in a piconet (1 master plus 7 slaves), but the number of slave connections the master can hold is 7, not 8.

The Bluetooth specification defines a piconet as consisting of one master device and up to 7 active slave devices. This 7-slave limit is a core constraint of the Bluetooth classic protocol's time-division multiplexing scheme, giving a total of 8 devices per piconet including the master.