Yes every few month remove the vent hose and vacuum in the back of the dryer and the vent hose itself. Always make sure the vent is straight as possible to help air flow as well. Don’t forget to Vacuum under the lint screen as well as lint will pass through it at times.
Any Energy star rated appliance is good but the best would be the Induction electric cooktop , so efficient and fast response time. Overall a fridge uses the most electricity so that is where you want to look at the energy guide when buying new.
Yes GE makes em as does LG and Samsung some Frigidaire models are offering it as an option now. So 100% not an issue to get a second icemaker today. The LG offers the second as a craft icemaker in some models that makes the larger cubes in a spherical shape and Samsung makes a nugget style so tons of great options.
I like to run a cycle of distilled vinegar once a month and use afresh cleaning tabs as well. Glad you asked great idea to do preventative maintenance.